There are a 100 ways to disarm these cars. Fuses, switches, plugs, so on. Sometimes, I don't even remember how to start it!
Do what I do. Do them all. Then, take a 5/8 vinyl coated cable with 2 loops in it, wrap it around the axle, and a big ass piston/bar lock, put a loose piece of brass over the bar (can't cut through it with a bolt cutter), and chain the car to the nearest stable pole/car/truck/wall/fence, and through the cable slack under the car so the scumbags don't see it until they try to move it. Then they will make a big sound and mess, get frightened, run off. Now you have to fix the car......but you still have the car. And you may catch them in the act. So, now you finally get your chance to do a service to humanity by chopping the head off a scumbag who clearly deserved it.