I was once in a Facebook group that allowed free speech for everyone. It encouraged, but did not require tolerance. Things went fairly well until a handful of wing nut males began harassing, sexually and otherwise; an older, liberal female.
They managed to sort of barely stare inside tos. They would misspell her name so it sounded like a vulgar word. Etc.
The owner / moderator refused to do anything. FB refused to do anything. Then the wing nuts graduated to racist taunts. They would call an urban black male a napa.
When the not so veiled threats started; staying was too much like condoning the perverse conduct.