How about automatically beeping at people who can't figure out how to use the god damn passing lane as it is intended?
Better yet, get V2V standard implemented and when the front facing radar senses you're less than five mph and you have more than quarter mile between you an the next car in the right lane and you have a approaching car from behind, have the car audio automatically be taken over with nothing but chorus from Move by Ludacris, ft. Mystikal & I-20 until your dumb ass moves over.