This has happened before. It goes down something like this: Server admin starts harassing people for whatever reason Users from that server start calling them

This has happened before. It goes down something like this: Server admin starts harassing people for whatever reason Users from that server start calling them out (usually with a #fediblock tag) Any sympathetic users will block the entire instance where the abuse is happening (this is called de-federation) Any instance is basically a private space, and there is no external authority which can influence what happens there. Instead, that server gets blocked from interacting with other servers. A server in isolation isn't much fun, so those users tend to migrate elsewhere until the offending server is empty and shuts down. The beauty is that there is no central authority which could potentially abuse users, but there is also no central authority to protect them. So we protect each other, and let the toxic servers stew in their own juices away from everyone else.