Well you have your terminology backwards. Trolls are the people who play the games.
The best answer to this question is a former Y!A employee. http://answers.yahoo.com/question/index;_ylt=AgCUu9FchNInrpbnPad.rIvsy6IX;_ylv=3?qid=20070813131309AAcAyF8
You break the rules with the AG and then they get reported by people who follow the rules of this forum. Then Y!A deletes it. If you appeal it is Yahoo! who reads the appeal and decides whether or not it is a violation!