haha, that would be hilarious.
But, I was thinking something more like this:
RF Remote Controlled Keyless Entry Deadbolt, Brass - RF-01P - Smarthome
I was surprised to find it that cheap.
The difference between this and the car is that the car unlocks the moment you touch the handle. You don't even need to press any buttons on the remote. It is essentially as if the car isn't unlocked if you are carrying the fob with you.