You need to have a structure for delegating moderation and such tasks to other people.

We actually have it: since there’s no central database of communities, who decides which ones appear in the homepage of the apps to first-time users? We use a “default list” of communities, which is effectively moderated (vetoed) by the app developer. This is the only “global admin” we basically have, but it’s only for the app itself, not the protocol, and it still doesn’t stop users from connecting p2p to the community (depending on the app, some plebbit client developers could implement blacklists).

I agree in general, just like the word “decentralized”. But in this case it’s legit, because it simply means it’s p2p. I’d call bitcoin “serverless” as well, so it’s BitTorrent and IPFS. Plebbit is exactly the same: you open the desktop app and it runs a p2p node automatically in the background, to run your subplebbit, and users connect to it peer to peer. Your p2p node is not really a “server”, because it doesn’t require any centralized domain to function, it uses transport protocols and peer discovery instead.