There are things like mailing lists since decades and they do fine. You are assuming that everyone can spam your messages whereas in reality with NOSTR you cho

There are things like mailing lists since decades and they do fine. You are assuming that everyone can spam your messages whereas in reality with NOSTR you choose from which relays to get updates. These relays are sovereign in the sense that they can (and will) define the rules and who can use them. I've never experienced misordered interactions since years of using NOSTR. This might be something of a theoretical issue because in practice that isn't observed.