Not a bumper sticker, but I saw it in a tat shop today on one of those signs you can buy:


WARNING: TRESSPASSERS WILL BE SHOT. SURVIVORS WILL BE SHOT AGAIN."


This one was a real bumper sticker. God save me from forum swearing but I have to do it now. We have loads of signs on the backs of vans and trucks here saying things like "Well driven? Ring xxxxxxx or visit xxxx.co.uk..."

Well this bumper sticker said "Badly driven? Go to gofuckyourself.co.uk..."