So Far I like Dart4forte's idea 🎯💥🤣🤣🤣. I do have security cameras but one doesn't always notice it right away and the vehicle blocks the area so it's hard t o confirm which one did the damage.
might try changing to a higher resolution camera.
Also thought about trying some sort of alarm to warn the flipping idiots or signs that say no delivery vehicles beyond this point. Not too fond of that and not sure they'd pay any more attention to them than they do backing up 🤬.

Any other ideas?