Legal Question in Real Estate Law in Pennsylvania

Call the police next time and they will tell you how to get a restraining order.

With all due respect to Michael, call the police now, file an incident report, and charge him with trespass. That will provoke some, and get others to back off. If he behaves, and apologizes, you can drop the charge if you think that is best, though with some people, that could be perceived as a sign of weakness, so be careful. Just do what you think that is in your daughter's best interest, and don't waste your time worrying about if you did the best thing. There is a good chance that if you advise the police of any prior violence, there is a good chance they will at least s/w him now, and then if there is another incident, they will arrest him, because you have laid the groundwork now.