When I see a Prius loaded with Obama bumper stickers, I get ahead of them and slow down to 20 mph UNDER the speed limit so they can't pass.
I tell the local PETA folks, "I love cats, I just can't eat a whole one."
One thing my co-worker likes to do is get ahead of asshole tourists who drive too slow and stomp on the gas of his turbo diesel, sending a nice thick cloud of black smoke into their faces. This is particularly effective in the summertime when they all drive with their windows down.
Before Blockbuster went out of business I put all the Michael Moore films in the comedy section.
If anyone at the bar starts talking about global warming I throw a snowball at them and say, "You mean THAT global warming?"
If I see a fat person riding an electric chair at Wally World, I turn it off and take the key when they stop and reach for something.
If I see a welfare queen with a cart full of food behind me, I point at them and say, "They're buying mine too."
Everytime I see some loser praising Obama after bitching about how they can't get a job, I ask them how that new Skittle-shitting pony is working out for them.
I put signs in front of all the Dunkin Donuts reserving at least half the spots for the local PD.