I ran across an interesting summary of fallacious reasoning titled The 10 Commandments of Rational Debate [logical fallacies explained] on relativelyinteresting.com. I'm wondering if it might be useful to adopt these as a set of easy-to-reference down/close/delete vote reasons:
Posts should not attack a person’s character, but address substance questions asked. (“Ad hominem”)
Posts should not misrepresent or exaggerate a person’s argument in order to make them easier to attack. (“Straw Man Fallacy”)
Posts should not use small numbers to represent the whole. (“Hasty Generalization”)
Posts should not argue thy position by assuming one of its premises is true. (“Begging the Question”)
Posts should not claim that because something occurred before, but must be the cause. (“Post Hoc/False Cause”).
Posts should not reduce the argument down to only two possibilities when there is a clear middle ground. (“False Dichotomy”)
Posts should not argue that because of our ignorance, the claim must be true or false. (“Ad Ignorantiam”).
Posts should not lay the burn of proof onto him that is questioning the claim. (“Burden of Proof Reversal”).
Posts should not assume that “this” follows “that”, when “it” has no logical connection. (“Non Sequitur”).
Posts should not claim that because a premise is popular, therefore, it must be true. (“Bandwagon Fallacy”).
(I've edited these slightly to remove the "commandments" flavor.)