I'm not sure whether to judge the obvious ignorance of your(our) opponents as a good thing or not.
Since their votes count equally I would hasten to say "not". (Unless they're pulling the lever for Ralph... heh heh heh.)
Some Ralph Nader signs at left-wing protests would be pretty effective, too (ought to give Democrats in the media real fits - how do they report a Nader rally - do they overhype it or under-report it, they think to themselves)...