Defederation actually does work both ways if the instance enables AUTHORIZED_FETCH. That setting requires 3rd party systems to prove their identity before they can retrieve any data, which allows an instance to block defederated domains. I don't know if Lemmy or Kbin supports that, but practically all of the microblogging fedi software does (that being Mastodon / GlitchSoc, Pleroma / Akkoma, Misskey / FoundKey / FireFish, and GoToSocial).
I agree that this is nothing to panic over, but I want to clarify that Lemmy is not safe from this. Lemmy and Mastodon both use the same protocol (ActivityPub) and that's also the protocol that Threads will use to federate. Just as Mastodon users can like, boost, and reply to Lemmy threads / comments, Threads users will be able to do the same. That's why it's important to defederate Threads on all ActivityPub-enabled instances.
I was working through a list of nature-related names, looking for an uncommon one that still sounded like a real name. I was almost ready to try out "Ember", but then I saw "Hazel" and it just clicked. So that's what I've called myself ever since!
![Hazelnoot [she/her]](https://beehaw.org/pictrs/image/1de8accf-46de-459a-8288-0a400ab08b4e.png?format=webp&thumbnail=128)
Defederation actually does work both ways if the instance enables
AUTHORIZED_FETCH. That setting requires 3rd party systems to prove their identity before they can retrieve any data, which allows an instance to block defederated domains. I don't know if Lemmy or Kbin supports that, but practically all of the microblogging fedi software does (that being Mastodon / GlitchSoc, Pleroma / Akkoma, Misskey / FoundKey / FireFish, and GoToSocial).