I heard from one ex-member of this site about hooking a electric fence box up to your car. Not sure if it would effect your ECU though. I just went with a $40 Fake Surveillance camera mounted in the front of the garage in plain site, a 130 lbs plus Rott, a decent alarm and a gun loving auto mechanic for a neighbor. Oh and if you get a dog, get an invisible fence installed so the theives don't know where the dogs yard ends or if it can go into the street. If you have a fence then it would be best to just shut it and lock it at night. Not many thieves want to lift all of their tools and stolen parts over a fence. Oh and if you see them messing with your car and you own a paintball gun. Go out and buy some jaw breakers. You can always shoot them out of a paintball gun. Although that would be illegal and wrong. So aim for the groins!