Thats all well and good but if they disconnect a battery, find the gps piece, tow it on a flatbed....that makes that gps useless, right? If the car is in a garage they cant really get to it....and if it is "gotten to" the insurance is the fallback...best measures you can take if you really think about it. Cars can be replaced, but doing two small things can make that A) not happen, or easy to deal with if it does.