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.
I want to note that LW definitely has exceptions to this norm, if only because of the boring, normal exceptions. (If we would get in trouble with law enforcement for hosting something you might put on LW, don't put it on LW.) We've had in the works (for quite some time) a post explaining our position on less boring cases more clearly, but it runs into difficulty with the sort of issues that you discuss here; generally these questions are answered in private in a way that connects to the judgment calls being made and the particulars of the case, as opposed to through transparent principles that can be clearly understood and predicted in advance (in part because, to extend the analogy, this empowers the werewolves as well).