cant argue with that!
i would add
responding to the troll instead of the serious poster and/or responding only to the weak posters
people too often take the opportunity to "crush" a troll with their superior logic as if logic had anything to do with the troll's post. they jump on the weak argument that is easily refuted and spend no time on the more sophisticated, hard to refute arguments of better posters. this contributes to every abortion/religious/political/globalwarming/anarchism thread being a retread of the last one.









