Most of the time I don't take the bait. Learned my lesson with an $800 speeding ticket. Sometimes I can't resist the urge and have to spank them.
More often, when I'm driving my Jeep I have the urge to really F with people in expensive sports cars that can't drive them. This weekend I outdrove a guy in an S4 on an exit ramp. As soon as we hit the straight he put the pedal to the floor. Thanks to PCA DE events, I had already proven my point in the turns.