Re: Old timer doubleplus good...
A simple slide switch on the fob to turn it off would be a good start, so that signal amplification can't be used to unlock and start the car. If the car goes out of range of the fob it should cut out and drift to a halt, and maybe lock all the doors, lock the brakes, sound the horn and flash the hazard lights. Maybe even remove keyless starting altogether - is there really a compelling reason why the driver can't take a key out of their pocket and turn it in a lock to start the vehicle? I'm not interested in buying a car that can't have this feature disabled, or preferably not fitted in the first place.