We ban people all the time for uselessness. See the Donny Long precedent.

And I'm getting tied of the racist crap, and I'm not the only mod. The general idea is to let idiots make fools of themselves but it's been getting out of hand.
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"If they can't picture me with a knife, forcing them to strip in an alley, I don't want any part of it. It's humiliating." - windsock