Voted up, but calling them "nerds" in reply is equally ad-hominem, ya know. Let's just say that they don't seem to have the very high skill level required to distinguish good unusual beliefs from bad unusual beliefs, yet. (Nor even the realization that this is a hard problem, yet.)

Yes, they're pretty softcore by LessWrongian standards but places like this are where advanced rationalists are recruited from, so if someone is making a sincere effort in the direction of Traditional Rationality, it's worthwhile trying to avoid offending them when they make probability-theoretic errors. Even if they mock you first.

Also, one person on RationalWiki saying silly things is not a good reason to launch an aggressive counterattack on a whole wiki containing many potential recruits.