Well, now I'm afraid to let mine out of the garage.
This might help -- mentally, at least. Check out Bait Car. Those beady-eyed, flappy-headed folks up north have been leaving cars just sitting around begging to be stolen. When they are stolen, the hidden GPS alerts the police while cameras roll. When the police get close, the remote immobilizer shuts down the car.
The videos are very cathartic. The only thing that would be better is if they tazed the criminals for good measure.
I'd like it if the car spewed Ricin or mustard gas through the air vents...