I totally agree they are well within their right to picket. I am wondering if that's not why he is seeking a restraining order. It could very well be someone harrassing him from the jail. We don't know, that's why I'm "wondering."
Wish SteveS was here to set us straight with the law.
I have seen arrest reports where the victims were inmates in a county jail & were being harassed by persons not incarcerated via mail and telephonically. Suspects were not only arrested but also convicted.