[Private_collector]

In the mid 70s my father bought a new Ford Falcon. For the first few weeks he relied solely on one of the devices that locks into the steering wheel and expands from one end to form a physical barrier to stop the steering wheel from turning until the device was unlocked with its key and removed. This worked well, but dad had seen a demonstration of how similar devices could be broken sufficiently that the vehicle could be driven away. Dad came up with a simple method of his design, that would outsmart any but the most determined of thieves.

The fuel line, which by good fortune, ran down beneath the driver side floor, was cut and rerouted through a simple on-off tap. The tap was hidden beneath the carpet, aft of the place where the front and rear carpet sections overlap. The tap was entirely hidden, and once turned to 'off' position, the vehicle would only move about ten feet once started. If you took too long getting ready, you wouldn't move any distance at all!

That tap worked well, too bloody well. I rarely drove dads car, but on the occasions that I did, you could be sure that I forgot about the damn tap more often than not. Dad sold that car in 1990. When the new owner went to drive it away,..........yep you guessed it, dad had forgotten to tell him about the tap, so it died as it was leaving the driveway. Once enlightened, the buyer saw the funny side. If that old car is still on the road (and that's doubtful) I expect you would still need a tow truck to nick it!!

Something similarly hidden would work equally well on any vehicle.