When I say moderation, I mean it in a lax sense. A single-user or small family instance is inherently moderated. Public instances will need dedicated moderators.
Requirements to participate should be lax. They're there to filter out the endless game of whack a mole with outright malicious instances. Those won't get to participate, but others will
Eventually this system can be used to enforce flag days across fedi too! "Have this safety feature for your users by $DATE or get defederated"
Inspired by @scottjenson's Toot: https://social.coop/@scottjenson/113067881426804607