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?
Yes, instance bans propagate out to the federation. But if user@a.com gets banned, they can just go sign up as user@b.com.
Thank you, it appears to be this way.