If I came upon someone spray painting my car, busting my window out, slashing my tire; yeah, I'm more than likely NOT going to be very happy, but it's not my job to enforce punishment on the culprit, it's the police's job. It's just a damn car.
Having your car spray painted is absolutely NOT the same principle as someone breaking into your house/garage.
Again, it's not our job to enforce punishment on the culprit, it's the police/court's jobs to do so.