Perma Ban with no warning
My friend just had it happen to him, and I've seen it talked about a number of other times. This is not cool. To ban someone without warning gives them no chance to change or get better, and pisses me off as a player. I consider myself to be a positive player, but the fear that I could get perma banned so quickly even after playing this game for 5 years and have no warning about it is enraging. I'd expect in a very high number of cases a 2 week ban would work just as well.
I know my one post I expect will not make a difference, but I can still hope.