I think having a steel boot on the front left wheel would slow a lot of these joy riders down. Of course, if it's a pro, they might have a tow truck and then it's gone, perhaps to be shipped overseas where paperwork can be forged. Much less likely for such individualized cars.The difficult thing is both deterring thieves in the first place, i.e. make it obvious that it's hard to steal, and actually making it difficult to steal. If you do the latter, like adding a kill switch somewhere, you might just be inviting more damage. It's a conundrum.