Would this even make sense? Or would this shove so hard against human nature that people would never be able to abide it?
(Of course, sometimes you'd be outraged at the community—or its management—and that'd be sort of an insidious policy in that case. I think it could still work if there was a "side" area—like MetaFilter's MetaTalk—that allowed outrage, but with the strong rule of not linking to the side area from the regular area, so people wouldn't just be having the same viral arguments by link-proxy.)