On Masto if you block someone and they move, you have to block them again. In this way the concept of federated instances can provide cover to all kinds of bad actors.

@protean I think it's clear that federation is deeply challenging in ways like this that are harder than centralized systems…

but is this case that much different than someone just opening a *new* Twitter account?

@protean You can either have security or privacy, not both. One solution is to force actors to reveal their email address, this would give a unique identifier that would follow them from server to server. But of course this means we all give up some sense of anonymity. I can't see any way to have both.

Even then an actor can always just host their own instance and then pretend to have any e-mail they want. They can switch domain names every few days too if they really wanted.

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