Yes, the simplest solution sometimes really is the right one. Cheaply isolate sensitive targets from easily accessible areas. Your $5 solution is enough to aver

Yes, the simplest solution sometimes really is the right one. Cheaply isolate sensitive targets from easily accessible areas. Your $5 solution is enough to avert these issues, and makes the attack a lot more expensive. The job is to find a "lever" where you only have to put in a little effort (say $5 worth) but which causes the thief to have to put in a lot of effort (cutting the car in half). The better the "lever", the safer the design.