Straying slightly off topic again, but I need to answer....
Immobilisers are making car crime worse? I can't believe I have just read that.
PAARMO, Immobilisers have definitely made it HARDER to steal a car, without a doubt. Unfortunately in your world, the criminal says "Ah, too difficult" and goes home. In my REAL world, the criminal says "I am still having that car, so how do I get it?". This means he needs the keys........... Think about it.
So when I say worse, I mean that the severity of a car theft now depends on how much resistance an owner decides to put up. Some give up the keys straight away, some are already dead................. Worse