True about the grinder but they'd need to think or know to do it. Can't imagine myself sneaking under every datsun with a torch looking for my parts anyway.

Hopefully a call from the police will get your money back. If you ever find yourself in legal dealings it's not a good look if you've done the wrong thing in retaliation. Usually a letter and a complaint sorts most things out and if not then the authorities. That's what they're there for right?