The size of mastodon.social is breaking the moderation story of the #Fediverse.
Moderation on fedi relies on:
1. instance admins and moderators being able to manage bad actors on their own instance;
2. instance admins being able to silence or defederate from insufficiently moderated instances.
Mastodon.social's size and the speed new accounts are set up there means that 1. is very difficult. The size of m.s. and the clout of some of its users means 2. is a hard decision.