now you can not invite yourself. we have a bug as send_contact_request_to was taken out but Invitation still used it

app/models/invitation.rb

@@ -13,6 +13,7 @@ class Invitation
   validates_presence_of :from, :to, :into
 
   def self.invite(opts = {})
+    return false if opts[:email] == opts[:from].email
     existing_user = User.find_by_email(opts[:email])
     if existing_user
       if opts[:from].contact_for(opts[:from].person)