Beehaw.org chose to defederate some big instances like lemmy.world because the beehaw admins feel like they can’t moderate the inappropriate content entering their instance from big instances without proper mod tools.
They made a long post sharing their reasons but I can’t find it at the moment.
But isn’t this kinda like the one click hosters like Rapidshare or Megaupload? Those services (at least the big ones I think) have been taken down for copyright infringement although they had the benefit of the doubt because data was stored fragmented and encrypted. Or am I not seeing something important?