Jezebel and to a lesser extent, Gawker have the most ridiculous commenters and writers.
AJ Daulerio from Deadspin just took over Gawker as editor, though, and I look forward to how butthurt those readers are going to be as he imposes his will on that site.
Jezebel commenters are the worst though. Gian Jergens was commenting there- she may have been banned or she may have been sucked into their vacuum of banality and got a star, I can't remember. Their commentariat is a crowd of feminists, fag-hags, and fags that are just dying to be incensed over something...anything.