It would fit your scenario better...
They are so broke that they can't afford clothes...but they have a vehicle to put bumper stickers on?
Do you think anyone can drive a car wearing a barrel?
It's almost impossible to get comfortable sitting down to drive while wearing a barrel.
I've never put political bumper stickers on my car, but I think I've come up with one I just might print up on a bumper sticker stock, spray it with some "fixit" or waterproof coating. It's fairly non offensive for the most part.