I’m just curious, what’s the plan (if any!) regarding moderation of users on other instances?

if you’re posting in a thread here but not registered on our instance, you’re still subject to being nice and generally courteous in line with what we expect of our own users.^[1] we’ve already pruned a few comments from people off-instance that fall in that category, but overwhelmingly we just haven’t had to moderate people from elsewhere and we’d like to keep it that way!

When would it get to the point of blacklisting an entire instance, as many have (IMO justifiably) done with Lemmygrad?

very rarely. we defederate with lemmygrad and exploding-heads, and our standard right now is basically “does your entire instance and/or most of your users go against our ethos?” as far as that. we don’t expect this to be a big problem