I try not to - though have a tendancy when people run me off the road.
What, are you driving? A Prius?
Geez man, you gotta get a full sized truck... with lots of dents and primer... and a gun rack. Nobody will run you off the road then. People will go out of their way to give you space.
Favorite Bumper Sticker:
CAUTION: Unlicensed, Uninsured, Illegal Alien with Gun Driving This Vehicle.