The best way to stop a fare skipper going on to become a perpetrator of violent assault and then a murderer is to come down hard on the fare skipper. Every-time you go lenient on some sort of deviancy or criminal behavior you allow it to escalate. Especially since the vast majority of all crime is committed by a small hard core of people.
https://hell.twtr.plus/media/bf3904eb277a062521dcba75e78e51e8defd3839cf8d01de8e1d120016b28379.file