diff --git a/ruby/lib/jam_ruby/constants/validation_messages.rb b/ruby/lib/jam_ruby/constants/validation_messages.rb
index a3a51621a..da90d06cd 100644
--- a/ruby/lib/jam_ruby/constants/validation_messages.rb
+++ b/ruby/lib/jam_ruby/constants/validation_messages.rb
@@ -43,6 +43,11 @@ module ValidationMessages
   INVALID_FPFILE = "is not valid"
   VERIFY_EMAIL = "You need to verify your email."
 
+  CHINESE_CANT_BE_MIXED = "must be all Chinese or Japanese"
+  CHINESE_NAME_TOO_LONG = "must be 4 characters or less when Chinese or Japanese"
+  NO_SPECIAL_CHARACTERS = "must not have special characters"
+  INVALID_NAME = "not valid"
+
   # recurly
   RECURLY_ERROR = "Error occurred during Recurly transaction."
   RECURLY_ACCOUNT_ERROR = "You don't have Recurly account yet."
diff --git a/ruby/lib/jam_ruby/models/instrument.rb b/ruby/lib/jam_ruby/models/instrument.rb
index e8b407135..16b907301 100644
--- a/ruby/lib/jam_ruby/models/instrument.rb
+++ b/ruby/lib/jam_ruby/models/instrument.rb
@@ -27,6 +27,7 @@ module JamRuby
         "tuba" => "tuba",
         "ukulele" => "ukelele",
         "upright bass" => "upright_bass",
+        "double bass" => "double_bass",
         "viola" => "viola",
         "violin" => "violin",
         "voice" => "voice"
diff --git a/ruby/lib/jam_ruby/models/invited_user.rb b/ruby/lib/jam_ruby/models/invited_user.rb
index 16be90d84..ae93bf76b 100644
--- a/ruby/lib/jam_ruby/models/invited_user.rb
+++ b/ruby/lib/jam_ruby/models/invited_user.rb
@@ -26,6 +26,7 @@ module JamRuby
     validate :valid_personalized_invitation
     # validate :not_accepted_twice
     validate :not_accepted_twice, :if => lambda { |iu| iu.email_required? }
+    validate :spammer
     validate :can_invite?
 
     after_save :track_user_progression
@@ -102,6 +103,31 @@ module JamRuby
       errors.add(:accepted, "you can only accept an invitation once") if accepted_twice
     end
 
+    # the same account should not receive emails within the same day
+    def spammer
+      max_invites_ever_per_sender
+      max_invites_per_day_per_sender
+      max_invites_to_receiver_per_day
+    end
+
+    def max_invites_ever_per_sender
+      if InvitedUser.where(:sender => self.sender).count > APP_CONFIG.max_invites_ever_per_sender
+        errors.add(:base, "max invites sent by this account")
+      end
+    end
+
+    def max_invites_per_day_per_sender
+      if InvitedUser.where(:sender => self.sender).where("created_at > ?", Time.now - 1.days).count > APP_CONFIG.max_invites_per_day_per_sender
+        errors.add(:base, "maximum number of invites sent in past 24 hours")
+      end
+    end
+
+    def max_invites_to_receiver_per_day
+      if  InvitedUser.where(:email => self.email).where("created_at > ?", Time.now - 1.days).count > APP_CONFIG.max_invites_to_receiver_per_day - 1
+        errors.add(:base, "someone has already sent to #{self.email} in past 24 hours")
+      end
+    end
+
     def one_facebook_invite_per_user
       rel = InvitedUser.where(:invite_medium => FB_MEDIUM, :sender_id => self.sender_id)
       rel = rel.where(['id != ?',self.id]) if self.id
diff --git a/ruby/lib/jam_ruby/models/user.rb b/ruby/lib/jam_ruby/models/user.rb
index a3942e9dc..e76563b35 100644
--- a/ruby/lib/jam_ruby/models/user.rb
+++ b/ruby/lib/jam_ruby/models/user.rb
@@ -291,9 +291,11 @@ module JamRuby
     validate :validate_update_email
     validate :validate_avatar_info
     validate :email_case_insensitive_uniqueness
+    validate :validate_spammy_names
     validate :update_email_case_insensitive_uniqueness, :if => :updating_email
     validate :validate_mods
     validate :presence_gift_card, :if => :expecting_gift_card
+    validate :validate_special_chars_names, :on => :create
 
     scope :musicians, -> { where(:musician => true) }
     scope :fans, -> { where(:musician => false) }
@@ -529,6 +531,56 @@ module JamRuby
       end
     end
 
+
+    def validate_special_chars_names
+      if name.include?("www")
+        errors.add(:first_name, ValidationMessages::INVALID_NAME)
+      elsif name.include?("http")
+        errors.add(:first_name, ValidationMessages::INVALID_NAME)
+      end
+
+      if !first_name.nil? && first_name =~ /[\\*\\.\\&\\:\\%]/
+        errors.add(:first_name, ValidationMessages::NO_SPECIAL_CHARACTERS)
+      elsif  !last_name.nil? && last_name =~ /[\*\.\\&]/
+        errors.add(:last_name, ValidationMessages::NO_SPECIAL_CHARACTERS)
+      end
+    end
+
+    def validate_spammy_names
+
+      test = ""
+      test += first_name if !first_name.nil?
+      test += last_name if !last_name.nil?
+
+      if test == ""
+        return
+      end
+
+      some_chinese = test !~ /\p{Han}/
+
+      any_chinese = (test =~ /\p{Han}/) != nil
+
+      all_chinese = (test =~ /\p{^Han}/) == nil
+
+      any_non_chinese = (test =~ /\p{^Han}/) != nil
+
+      if any_chinese
+        # must be ALL chinese
+        if !all_chinese
+          errors.add(:first_name, ValidationMessages::CHINESE_CANT_BE_MIXED)
+          errors.add(:last_name, ValidationMessages::CHINESE_CANT_BE_MIXED)
+        elsif !first_name.nil? && first_name.length > 4
+          errors.add(:first_name, ValidationMessages::CHINESE_NAME_TOO_LONG)
+        elsif !last_name.nil? && last_name.length > 4
+          errors.add(:last_name, ValidationMessages::CHINESE_NAME_TOO_LONG)
+        end
+      end
+
+
+
+
+    end
+
     def validate_avatar_info
       if updating_avatar
         # we want to mak sure that original_fpfile and cropped_fpfile seems like real fpfile info objects (i.e, json objects from filepicker.io)
diff --git a/ruby/spec/jam_ruby/models/invited_user_spec.rb b/ruby/spec/jam_ruby/models/invited_user_spec.rb
index a00db8a20..a9a6777e4 100644
--- a/ruby/spec/jam_ruby/models/invited_user_spec.rb
+++ b/ruby/spec/jam_ruby/models/invited_user_spec.rb
@@ -6,6 +6,79 @@ describe InvitedUser do
     UserMailer.deliveries.clear
   end
 
+  describe 'spammer' do
+
+    after {Timecop.return}
+
+
+    let(:user1) { FactoryGirl.create(:user) }
+
+    it 'max_invites_ever_per_sender' do
+
+      Timecop.travel(Date.new(2016, 3, 20))
+
+      APP_CONFIG.max_invites_ever_per_sender.times do
+        invited_user = FactoryGirl.create(:invited_user, :sender => user1)
+      end
+
+      invited_user = FactoryGirl.build(:invited_user, :sender => user1)
+      invited_user.save
+      invited_user.should_not be_valid
+
+      # but move time forward...
+
+      Timecop.travel(Date.new(2016, 3, 22))
+
+      # this should never 'heal'; once you hit max, you are done for good
+      invited_user = FactoryGirl.build(:invited_user, :sender => user1)
+      invited_user.save
+      invited_user.should_not be_valid
+    end
+
+    it 'max_invites_per_day_per_sender' do
+
+      Timecop.travel(Date.new(2016, 3, 20))
+
+      APP_CONFIG.max_invites_per_day_per_sender.times do
+        invited_user = FactoryGirl.create(:invited_user, :sender => user1)
+      end
+
+      invited_user = FactoryGirl.build(:invited_user, :sender => user1)
+      invited_user.save
+      invited_user.should_not be_valid
+
+      # but move time forward...
+
+      Timecop.travel(Date.new(2016, 3, 22))
+
+      # this should work because we moved forward by 2 days
+      invited_user = FactoryGirl.create(:invited_user, :sender => user1)
+    end
+
+
+    it 'max_invites_to_receiver_per_day' do
+
+      Timecop.travel(Date.new(2016, 3, 20))
+
+      APP_CONFIG.max_invites_to_receiver_per_day.times do
+        invited_user = FactoryGirl.create(:invited_user, :email => 'seth@jamkazam.com')
+      end
+
+      invited_user = FactoryGirl.build(:invited_user, :email => 'seth@jamkazam.com')
+      invited_user.save
+      invited_user.should_not be_valid
+
+      # but move time forward...
+
+      Timecop.travel(Date.new(2016, 3, 22))
+
+      # this should work because we moved forward by 2 days
+      invited_user = FactoryGirl.create(:invited_user, :email => 'seth@jamkazam.com')
+    end
+
+
+  end
+
   it 'create an invitation from end-user' do
 
     # create an end user
diff --git a/ruby/spec/jam_ruby/models/user_spec.rb b/ruby/spec/jam_ruby/models/user_spec.rb
index 0b8729dd9..ae6f1a3ed 100644
--- a/ruby/spec/jam_ruby/models/user_spec.rb
+++ b/ruby/spec/jam_ruby/models/user_spec.rb
@@ -98,6 +98,69 @@ describe User do
     it { should be_admin }
   end
 
+  describe "namespam" do
+
+    describe "no hostnames" do
+      before {@user.first_name = "bleh www.something.com"}
+      it { should_not be_valid }
+    end
+
+    describe "first name can't be mixed chinese" do
+      before {@user.first_name = "注冊ww"}
+      it { should_not be_valid }
+    end
+
+    describe "long chinese names" do
+      before {@user.first_name = "注冊注冊注冊"; @user.last_name = "注冊"}
+      it { should_not be_valid }
+    end
+
+    describe "if chinese first name, must be chinese last name" do
+      before {@user.first_name = "注冊"; @user.last_name = "abc"}
+      it { should_not be_valid }
+    end
+
+    describe "chinese names can be allchinese" do
+      before {@user.first_name = "注冊"; @user.last_name = "注冊"}
+      it { puts @user.errors.inspect; should be_valid }
+    end
+
+    describe "no hostname-looking stuff - first name" do
+      before {@user.first_name = "www server com"}
+      it { should_not be_valid }
+    end
+
+    describe "no hostname-looking stuff - last name" do
+      before {@user.first_name = "www server com"}
+      it { should_not be_valid }
+    end
+
+    describe "no junk characters" do
+      before {@user.first_name = "name.come"}
+      it { should_not be_valid }
+    end
+
+    describe "no junk characters - period" do
+      before {@user.first_name = "name.come"}
+      it { should_not be_valid }
+    end
+
+    describe "no junk characters - percent" do
+      before {@user.first_name = "name%"}
+      it { should_not be_valid }
+    end
+
+    describe "no junk characters - amp" do
+      before {@user.first_name = "name&"}
+      it { should_not be_valid }
+    end
+
+    describe "no junk characters - asterisk" do
+      before {@user.first_name = "name*"}
+      it { should_not be_valid }
+    end
+  end
+
 
   describe "when first name is not present" do
     before { @user.first_name = " " }
diff --git a/ruby/spec/support/utilities.rb b/ruby/spec/support/utilities.rb
index 9e17eb029..91858a0db 100644
--- a/ruby/spec/support/utilities.rb
+++ b/ruby/spec/support/utilities.rb
@@ -318,6 +318,18 @@ def app_config
       1
     end
 
+    def max_invites_ever_per_sender
+      4
+    end
+
+    def max_invites_per_day_per_sender
+      3
+    end
+
+    def max_invites_to_receiver_per_day
+      1
+    end
+
     def check_bounced_emails
       false
     end
diff --git a/web/app/assets/images/content/icon_instrument_double_bass24.png b/web/app/assets/images/content/icon_instrument_double_bass24.png
new file mode 100644
index 000000000..c054f32ad
Binary files /dev/null and b/web/app/assets/images/content/icon_instrument_double_bass24.png differ
diff --git a/web/app/assets/images/content/icon_instrument_double_bass256.png b/web/app/assets/images/content/icon_instrument_double_bass256.png
new file mode 100644
index 000000000..c5373a215
Binary files /dev/null and b/web/app/assets/images/content/icon_instrument_double_bass256.png differ
diff --git a/web/app/assets/images/content/icon_instrument_double_bass45.png b/web/app/assets/images/content/icon_instrument_double_bass45.png
new file mode 100644
index 000000000..7c2b8e1d1
Binary files /dev/null and b/web/app/assets/images/content/icon_instrument_double_bass45.png differ
diff --git a/web/app/assets/javascripts/globals.js b/web/app/assets/javascripts/globals.js
index e21d883e2..922953b86 100644
--- a/web/app/assets/javascripts/globals.js
+++ b/web/app/assets/javascripts/globals.js
@@ -231,7 +231,7 @@
         "Electric Guitar": { "client_id": 50, "server_id": "electric guitar" },
         "Keyboard": { "client_id": 60, "server_id": "keyboard" },
         "Piano": { "client_id": 61, "server_id": "piano" },
-        "Upright Bass": { "client_id": 62, "server_id": "double bass" },
+        "Double Bass": { "client_id": 62, "server_id": "double bass" },
         "Voice": { "client_id": 70, "server_id": "voice" },
         "Flute": { "client_id": 80, "server_id": "flute" },
         "Clarinet": { "client_id": 90, "server_id": "clarinet" },
diff --git a/web/app/assets/javascripts/utils.js b/web/app/assets/javascripts/utils.js
index 304a28078..755a7ce1b 100644
--- a/web/app/assets/javascripts/utils.js
+++ b/web/app/assets/javascripts/utils.js
@@ -85,6 +85,7 @@
     "tuba": "tuba",
     "ukulele": "ukulele",
     "upright bass": "upright_bass",
+    "double bass": "double_bass",
     "viola": "viola",
     "violin": "violin",
     "voice": "voice"
diff --git a/web/app/controllers/api_live_streams_controller.rb b/web/app/controllers/api_live_streams_controller.rb
index 225ea7cef..c979aa7aa 100644
--- a/web/app/controllers/api_live_streams_controller.rb
+++ b/web/app/controllers/api_live_streams_controller.rb
@@ -73,6 +73,15 @@ class ApiLiveStreamsController < ApiController
       end
       participants = params["participants"]
 
+      if !participants.nil? && participants.to_i < 2
+        return
+      end
+
+      duration_sec = params["duration_sec"]
+      if !duration_sec.nil? && duration_sec.to_i < 180
+        return
+      end
+
       body = "\n"
       body += "Participants: #{participants}\n\n"
       body += build_user_detail(current_user)
@@ -108,7 +117,6 @@ class ApiLiveStreamsController < ApiController
         client_live_stream.save
       end
 
-
       AdminMailer.ugly({to:'david@jamkazam.com', cc:'seth@jamkazam.com,peter@jamkazam.com', body: body, subject: subject}).deliver_now
     rescue => e
       AdminMailer.ugly({to:'david@jamkazam.com', cc:'seth@jamkazam.com,peter@jamkazam.com', body: params.to_s + "\n\n" + e.to_s, subject: 'Live Stream Started!'}).deliver_now
@@ -117,7 +125,7 @@ class ApiLiveStreamsController < ApiController
   end
   def stream_started
 
-    email_stream_event("Live Stream Started!", false)
+    #email_stream_event("Live Stream Started!", false)
 
 
 
diff --git a/web/app/views/users/_user_dropdown.html.erb b/web/app/views/users/_user_dropdown.html.erb
index 55c761ac5..11f3935fc 100644
--- a/web/app/views/users/_user_dropdown.html.erb
+++ b/web/app/views/users/_user_dropdown.html.erb
@@ -61,7 +61,7 @@
       </ul>
     </li>
     <li class="download-app"><%= link_to "Download App", downloads_path, :rel => "external" %></li>
-    <% if @nativeClient %>
+    <% if false #@nativeClient %>
       <li class="test-network"><%= link_to "Test Network", '#' %></li>
     <% end %>
     <li class="get-help"><%= link_to "Get Help", 'https://forum.jamkazam.com/', :rel => "external" %></li>
diff --git a/web/config/application.rb b/web/config/application.rb
index 14bca627d..a39ab2d23 100644
--- a/web/config/application.rb
+++ b/web/config/application.rb
@@ -385,6 +385,11 @@ if defined?(Bundler)
     config.jamtrack_landing_bubbles_enabled = true
     config.jamtrack_browser_bubbles_enabled = true
 
+    # spam for invited users
+    config.max_invites_ever_per_sender = 70
+    config.max_invites_per_day_per_sender = 20
+    config.max_invites_to_receiver_per_day = 1
+
     config.react.variant      = :production
     config.react.addons       = true
 
diff --git a/web/spec/support/app_config.rb b/web/spec/support/app_config.rb
index a9e69058c..7962415d1 100644
--- a/web/spec/support/app_config.rb
+++ b/web/spec/support/app_config.rb
@@ -168,6 +168,18 @@ def web_config
     def rating_dialog_min_num
       1
     end
+
+    def max_invites_ever_per_sender
+      3
+    end
+
+    def max_invites_per_day_per_sender
+      4
+    end
+
+    def max_invites_to_receiver_per_day
+      1
+    end
   end
   klass.new
 end