Incentive: Leave surprising notes to other players. For the record, I could see this being abused by people to leave obscene messages in game.
In other news, I've been wondering this, but why is it when I scroll with the mouse scroll wheel it goes so incredibly slow? I've got a mouse (Logitech G502) with an adjustable one, and a casual flick of it on it's loose setting barely makes it through my entire six game list. With it on non-loose mode, it's a solid 13+ flicks of the mouse wheel.