We're not there when he comes and he's never done anything to US - if our son won't complain, we have no way to swear J's done anything wrong. There's no law against someone coming over and knocking on the door or sitting on the patio or even coming in with our son's permission. Again, he'd say he was invited and unless our son would complain, no case. So actually, under our state's laws, we have no grounds for a restraining order.
Now, should he do something crazy like break the glass on the patio door - we'd call the police, have him arrested, then dance a jig because we really want to replace those doors but can't afford it and with a break in insurance would pay. But that would be terrible. 
