The fact that they post dox (names, addresses, other personally identifying information) makes that a pretty weak defense in my mind. If you write up this long post about how someone is a terrible human being and include their PII right next to it, what happens next isn't exactly hard to guess. And these people are not stupid, they know what will happen next even if they don't actually ever harass the person.

I wouldn't have a problem with them discussing other people among themselves, but including addresses and phone numbers and such is such a bad faith "I'm not touching you I'm not touching you ha ha ha" that I wouldn't mind seeing them burned down on principle.