Sadly, a different method, but a similar result; silence.Some of these groups are public, closed, or private. You have a better chance of knowing about them if you already have friends on your Facebook who are also members of the fat community. My particular group is secret, we don't solicit new membership and you have to be admitted by member invitation and admin approval only. It is , IMO, the best way to keep out the trolls and minimize the drama. THe downside is that the group is pretty quiet with the exception of a small core of members.
As a person who is regularly incensed by the lack of a constructive, supportive venue for struggling FAs to discuss their feelings, it really saddens me to hear this. I'm sure it's less work to maintain when membership is that restrictive, but once again, the online desert stretches out before me.