I do >>20 too. People never know if I really hold a view I'm arguing or if I'm playing a devil's advocate or something.

I think a lot of this thread relates not only to the internet though, but would apply to talk radio. I know how >>16 feels listening to the radio and hearing fallacy after fallacy. I've never actually bothered to call as I figure a) they wouldn't let me on because I'm not a raving lunatic, b) if i was on the host would talk over me or cut me off, and c) driving while talking on a cell phone is not really a good idea. I haven't even emailed one of the hosts either. I'm sure that some intern reads and responds to most of them. Even if my email was read by the host they are either really as moronic and extermist as they are on the radio and thus could not be pursuaded or they are just playing up for the audience because it gets listeners.