I have just logged in on my own Lemmy instance, and I see a list of banned users in the administrative area, from other instances. I have not banned anyone myself.
How does it work? If you’re banned from an instance, you’re banned from the whole federation?
They’re banned on their instance, so their instance wouldn’t even attempt to federate their content.
My question is why would another instance need to know which local user accounts of an instance have been “banned” by the instance they’re registered at?
No clue. Maybe it just needs to work that way in the current implementation