What if moderation were partially decoupled from server administration in the fediverse? What if you could choose one or more moderators or blocklists to "subscribe" to, and then make your own exceptions about specific users or servers to block or allow? Maybe "reports" could be compiled into user-specific block lists, which could then be voluntarily aggregated. Kind of a federated approach to moderation itself...
It seems like this would be a better system, and also would resolve a lot of debate about moderation and defederation up front.