I have nothing against "soccer moms", I just don't want to see endless photos of their kids, which may be ironic since there's shitposting on all social networks. Perhaps we'd be able to ignore those communities, however it'll leak over to other communities.
It seemed to be "fine" when "those" sorts of "regular folk" stuck to facebook for their fix of sharing their lives.
Anyway, this aspect isn't the main point, I'd say - it's that one cannot trust facebook, and if they want to federate, it cannot be good for us.