I have remonstrated with motorists who leave their engine running while they nip back into the house or a shop, but what's the use? It
is an offence, but perceived as a 'victimless crime'. I just hope we never come to the day when a car runs away on its own (an automatic left in 'drive' maybe) and runs down and kills a child - or a car is stolen by youths who then kill a road user - I just hope that the driver then doesn't plead 'victimless crime'...
Incidentally, what's the mileage in making the owner of a vehicle responsible to some extent, for consequences of their vehicle being stolen? I really don't know how to steal a car - the thought that I might wish to have this knowledge has never occurred to me

. I suppose, a bit of training and I might figure out how to hot-wire, but defeating the steering-lock? I thought that if you use brute force you'll just snap the steering column first.
Or are our teenage TWOCers expert lock-pickers every one of them?
So I suspect there's a fair bit of negligence here: driver leaving the keys where thieves can get at them. So what price holding the driver to blame?