watchgroup sounds like an idea.
there a few thing on the DMV website, like there is this thing that shows ur VIN number n ur windshield or window and i am not sure how is categorize but at a certain time of night the police will stop or check ur car when they see it.. and another diff thing is the police will check the car if is parked for a certain amount of time. some of this stuff lower ur car insurance.

i guess i will stick the only safe way, tracking devide call u up righ away if the car leave ur block or the zone u select. just better make sure u got another car to follow ur car especially when u command the car to turn off while running or it will automatically turn off when come to a full stop "red light".