Nah, if I do that I never get a chance to catch the bastards who try to rip them off or let the air out of my tires. I love pissing people off in Boston and I don't have a love affair with cars so the bumper stickers stay on 24.7.
I'm getting a new one that goes like this:
DEPOSING GENOCIDAL LUNATICS IS A FAMILY VALUE
Whaddaya think??