"The problem, though, is the legal framework. In the United States, for example, certain carmakers, such as BMW, offer services that track where your car is with GPS signals. It is also possible to remotely turn your car’s ignition and off, but it is illegal to do so, even though the technology exists. Admittedly, though, abruptly shutting down your car on a busy intersection or highway could be"
how about delayed switch? instead of shutting down the engine as soon as the signal is received, the engine shuts off when the car is stopped? the thief GOT to stop somewhere at some point....at a stop light, gas station, or even his home...