It's a matter of principle, and the guy being a arrogant jerk.
His actions say enough about his personality. People that think and act like him don't have an easy life. Always looking over their shoulder, waiting, wondering if there will be retribution.
If he did this over a section that is wrapped your in luck. Most PPF is self healing and this type of micro marring should go away just from the heat of the sun. If it doesn't take it back to the shop and let them hit it with their heat gun. Removing any marring from the clear would take less than 5 minutes with a couple pad and compound changes. A good detailer can polish minor scratches out of PPF.