Republikin, they're all confined to this thread - POLITICAL FUNNIES & SATIRE - and that's exactly what they are, whether we agree with them or not. As long as they're not obscene, racist, slanderous, libelous or in totally bad taste - or if they're not thrown in deliberately to disrupt other threads - deleting them probably would be too much moderation.
Besides, anybody who takes 'em seriously probably needs serious psychiatric help - and probably also believes Sarah Palin actually said she could see Russia from her front porch (that was Tina Fey on Saturday Night Live.) The moderation team at ATZ has enough of its own problems without dealing with somebody else's. 