I used a piece of PVC pipe, with a broomstick that was a snug slip fit. Duct-tape a bungee cord to the outside of the pipe, and cock the device by pulling the stick back and stretching the bungee. Drill a hole for a cotter pin to keep the stick cocked.

Now- - - - Fill the pipe with fine-ground cayenne pepper and stick a piece of masking tape over the end to prevent spillage. Bungee this assembly to the steering wheel, open end toward the driver's door, with a piece of monofilament fishing line routed to the inside door handle. When the scumbag opens the door, he gets a faceful of pepper, followed a split second later by a broomstick between the eyes! It's hard to drive away with both eyes shut!
eek eek eek
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!