What happens when community tags get orphaned? Can the tag short name (I.e. a/communismbabble) be reused my multiple communities? Since communities could be subscribe-only, and nobody else would see them unless their subscribed, they could be subscribed via their pubkey and the community 'handle' could be used by many groups. This would avoid people squatting on handles, and if someone dies without adding other moderators/owners, the community can simply move to a new pubkey. The only wrinkle is when a client is subscribed to more than one community with the same handle, but you should already have a UX solution to this for npub/username conflicts