People creating new accounts to train people, etc will never end unless accounts require something to activate. I understand charging money is out but I'd like to see some kind of phone verification system put in where you have to enter a phone number and verify the PIN it gives you so that people abusing accounts get the number blacklisted. Eventually you run out of numbers or have to pay for additional numbers so it becomes less trivial and I have to imagine there's a cheap/free way this system could be implemented.
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