What is the largest armpit of stupidity on the Internet?

All media tend to produce strange attractors for mouthbreathing idiocy; television has Glen Beck and America’s Funniest Home Videos, radio has Opie and Andy and Rush Limbaugh, newspapers have The National Inquirer and People. The Internet, however, seems to possess more concentrations of slackjawed stupidity than any other medium I’ve ever experienced.

In your opinion, what forum is the absolute deepest pit of ignorance and stupidity? And, more to the point, why do you believe stupidity has been drawn there?

(In answer to my own question, I would have to point to Yahoo!Answers as the most astonishing concentration of dumb ever to have existed on the Internet—quite a feat, given its competition from such sites as Eagle Forums and Stormfront.)