Ad hominem - attacking the arguer and not the argument. rude and hostile 'basher bashers' Argument from "authority". CEO said so Appeal to ignorance (absence of evidence is not evidence of absence). you can't prove it's a scam, so it's not Caricaturing (or stereotyping) a position to make it easier to attack. shorts are morons, anti-american, bad parents Suppressed evidence or half-truths. see 'authority' above