Edit:

I reached out to Lemmy World admins (!lwadmin) and they said:

If a user is banned on their home instance then it federates to others, if banned on instances other than their home, it doesn’t

  • MrMusAddict@lemmy.worldEnglish
    32·
    1 year ago

    As far as I understand;

    A user is specific to one instance. In order to interact with the fediverse on that specific account, they need to log into that instance. If they’re banned from that instance, they cannot log in and interact with the rest of the fediverse.

    There’s nothing stopping them from logging into an alt, whether on that same instance or on another instance.