Well, I know you can't stop internet racism and childish nonsense, but giving warns/suspensions might help.
Just add Racism to personal attacks or excessive flaming? I dunno, just figure a lot of people are tired of seeing these stupid words float around.
I realize there is the whole freedom of speech thing, but a line should be drawn. No poll, would rather discussion on the topic then simple 'no' or 'yes' answers.