I have to concur with JackBlades. It should only take a few incidents, and carjackings will drop like the proverbial rock. After all, if you know that these things are in some vehicles, why take the chance on getting fried??? /ubbthreads/images/graemlins/grin.gif
Or they just order you out of the car from a few feet further away... /ubbthreads/images/graemlins/rolleyes.gif
I doubt a bullet will have any problems with the difference in distance.
I saw that on a TV program ("Real TV" I think) a few years back. Would never go over here due to the fear criminals might use it on police during stops.