One thing I’ve noted about logical fallacies… they ain’t. At least not all of them all the time. Oh sure, they’re an intellectual and emotional shorthand and often do mess things up, but contained within them is an awful lot of good sense, which enables people to make reasonable judgements without having to think through from first principles and acquiring all the facts (which nobody can do anyway).
For example, Ad Hominem is a pretty good one. Maybe Hitler suddenly pops up with a program for world peace and prosperity, but you’d be a fool to listen to him. It’s most suspect where the counter-arguer is biased or irrational.
For example, Diogenes the Cynic can be counted on to interject several lines about Bush is the avatar of sin and stupidity incarnate, or how McCain is a nightmarish fiend of unrelenting horror, into pretty much everything. It doesn’t matter what the thread is, seemingly Dio will find to way to say how much he hates anyone and everything which is not his political pet. His arguments are unreliable because he views everything through the lens of “Is My Politics == Good” and “Is Not My Politics == Bad”.
Of course, some of them just plain suck.