Nobody de-federated. People saw that there was a the_Donald community on sh.itjust.works + a lot of people from said server defending it ("just ignore it bro"). That triggered probably bad memories ala spez defending t_D because of "VaLuABlE DiSCuSsIoN", while they brigaded and harrased countless people during their time on Reddit. Some people got a little bit carried away and demanded de-federation and a couple of trolls throw gazoline in the fire.
This is one of the personal fears I have about society's where 'the mob' decides. Most people haven't had their fate decided by a mob before and so might not know what this means or how it pans out most of the time.
I believe it is imperative that we have something in place to avoid mob actions - not a central authority per say but possibly a collective code we all believe in and abide by. We could perhaps establish what is (un)acceptable on a fediversal (universal) scale and what is (un)acceptable on a local instances (instances decide this themselves obv.)
In the future we might need Lemmy/ActivityPub to be able to define posts/accounts/communities that are accessible across the Fediverse and those that are only accessible to users of that instance.
Hence we wouldn't have the problem where for instance: members of one instance think pictures of furries is not NSFW content but members from other instances think it is
You realize a major purpose of federation is so that content can't be censored so easily by a central authority? This isn't Twitter. If you need a safe space, the fediverse isn't for you.
This is exactly the space for creating all sorts of spaces. No one needs to federate with you here. It's up to instance owners and there's plenty of instances.
Nazi trash can stay entirely off any instance that I'm on and if they show up and nothing is done I'll go elsewhere. Period.