Idea: if you mod a community on a lemmy.somewhere you should be able to migrate it to lemmy.elsewhere which would include all post & comment links being forwarded and subbed users having their subscription updated to reflect the new location.
I’m aware this would be a way down the road as user account migration alone is still not great but it would be a great feature for the fediverse to have to avoid centralisation and mod/server admin wars.
I think it should be a “copy community” feature, then mods can just prevent posts in the old community and make a sticky that points to the new location.
Making users automatically subscribe to a community on a different instance (even if it’s “the same community”) is pushing it a bit in terms of moderator power. Also makes things worse in terms of exploits and others have pointed out.