This is more of a question for the admins, but this can certainly be a more open discussion.
Per this thread, beehaw defederated from lemmy.world and sh.itjust.works two months ago, around the time that the reddit exodus was happening. Lemmy was blowing up, those instances had an open sign-up policy, and this meant that admins of other instances (like Beehaw) that wanted to heavily moderate their communities became quickly overwhelmed with the number of users from these two instances. Beehaw defederated to make the workload more realistic.
Two months on, I’m wondering if this defederation is still necessary. It seems to me that Lemmy overall has slowed down a lot, and maybe the flow of users from these outside servers would not be as overwhelming as it was before? I respect the decision of the admins one way or the other - I know that the lack of moderation tools was another factor in this decision. I’m just curious if this is something that has been considered recently?
Oversight - that simple.
That is not actually a problem with Lemmy in general - community bans do block posting unlike site bans. As for why, well, it was done at that point in time because Lemmy.World and Sh.it just.works took a lot of moderation time - for one reason or another, bad actors liked to go there. I have no reason to believe this has changed now that .World is now many times bigger than it was.
Oversight or malice. You can break the modlog of everyone you’re federated with because of this - that is dangerous.
Size doesn’t necessarily mean problems though. I think it’s probably a culture problem as the root cause but I don’t think .World wants to tackle that problem so all I can do is wait for better tools.