Yeah, you kind of made it sound like you think the guy you know is clever for keying and vandalizing peoples’ cars. That’s shitty behavior and he needs both medication and some jail time to cool him down.
As for the Left, and I presume you mean the subject of the original post: I would prosecute to the full extent of the law and file civil suit to recover all my damages if he didn’t make full and immediate restitution.
Lawyers, hand grenades and atomic bombs. Nobody wins, nothing gets settled and nothing turns out well.