I moved the big meta-level comment thread from "Yes Requires the Possibility of No" over to here, since it seemed mostly unrelated to that top-level post. This not being on frontpage also makes it easier for people to just directly discuss the moderation and meta-level norms.
That's not what I meant. I meant specifically someone who is trying to prevent common knowledge from being created (and more generally, to gum up the works of "social decisionmaking based on correct information"), as in the Werewolf party game.