Exactly, no one needs an incentive to be a good and polite player, so why does SE feel it is a good idea to bribe rude and mean players into being good? I think it is very sad that this community is so bad, player wise, that this has even come about.
Actually, no. Some people enjoy being turds and DO need an incentive to not be one. It has to be more profitable for them than the entertainment value of being toxic.