When I get a real foaming-at-the-mouther like one of these guys, I have given up on trying to get them to vote for the President. Instead I try to convince them that Jean Francois Kerry is a sell-out, and they should vote for the only real anti-war, anti-corporate-greed candidate, Ralph Nader...
I consider those types little different than brainwashed Hitler youth who were weaned on a ideology of hate. I seldom respond to them anymore either, and just write them off as having human excrement for brains...