This rule fails for RationalWiki in particular, so I don't think it's sufficiently expressive. RationalWiki will never get violent, they'll never use basic rhetorical fallacies, but are they not idiots?

They won't threaten physical violence, but when discussing certain political topics (libertarianism, social justice and feminism) they do use basic rhetorical fallacies in addition to generally abusive behaviour even from the admins (trolling, name calling and swinging the banhammer).
Surprisingly, when discussing other topics, such as science, pseudosciences and paranormal beliefs, they look like perfectly sane and rational folks.
(I've never engaged them, my experience comes form browsing the wiki and lurking a little bit on the 4ch-...Facebook group)

I think they aren't idiots but just political fanatics.