Put a McCain/Palin bumper sticker on your car and you are guaranteeing a keying on your paint job.
BTW, I would love to see a car with just such a bumper sticker parked near a college campus and watch via hidden camera how many times it gets keyed/slashed. This might make for an interesting YouTube project.
Funny thing is, they were owned by tenants there who were busy collecting money for parking on their yard. Capitalism conquers all!