They just need to steal the car and hit HOME on the navigation system. They are then taken directly to the home of the car's owner. Most cars will even conveniently have the garage door opener on their visor, so the thief can just pull into the garage like he owns the place. If the house is empty, the burglar will have the leisure of ransacking the place without the need for forced entry and the neighbors wouldn't even have a clue.
You have thought of a very interesting scheme. Add to your plan stealing cars left for several day parking at an airport terminal. Our car has the garage door opener button on the rear view mirror. Just drive by at night when neighbors are sleeping.
MY navigator system is MY BRAIN & printed maps.