As a bit of theft prevention I added a switch under the dash that wasn't visible easily to shut off the pump when I parked the car. The car would start and could be driven about 1-2 blocks before the fuel bowel went dry and the engine would stop and since it had started and run "it just died" and they would give up and leave it.
That's a great idea, and it has obviously worked, but I have to ask...how many times as your car been stolen??