...he counter sues you for assault, you have to pay all legal costs and medical expeses that would amount to alot more than your car is worth, so probably worth keeping that in mind.
I think something should be done tho, maybe bar up the doors and torch the place to destroy all evidence afterwards lol j/k.
but seriously dealing with it in the proper ways might not be the most directly satisfying, but it doesn't put your own ass on the line.