enigma1 - 12:15 pm on Nov 26, 2011 (gmt 0)

I don't see a forum owner putting themselves at risk, they'll simply remove anything that has a complaint whether legitimate or not.

Depends what evidence you have to back the claim. If the forum owner is an expert on the topic posted and verifies it (and in many cases this happens) he ain't going to remove anything. Regardless if the poster is anonymous or not, what he's posting can still be a fact. In such cases removal requests will backfire.