Actually it is the morons that don't keep right except to pass
Sure the funny or silly bumper stickers and the ones that say where you've been (This Car Climbed Mt. Washington, etc) fine. But to Holli4pirating's point, isn't telling strangers who you voted for or intend to vote for confrontational?
Regarding the troop support mahnets and stickers, well, I have some opinions about those but I will start a separate thread.
Brad
You putting a sticker on your car promoting a candidate is free speech. You putting a sticker on MY car is confrontational.