There's something else to consider about flame wars, and that is the less polite they are the more hits they get. This is due to the inflammatory nature of the discussion. Sure, it keeps some people away though. The flip side to this is that over-moderated threads are boring, and get less hits. Moderators have to walk a fine line between stifling discussion and keeping trolls in check.
Anything to bring some dignity back to these threads. The Evo-Creo threads are the Rodney Dangerfield of Fr.