Said this yesterday. It would have been easier to sign a Bitcoin transaction and drop an npub. Then they can DM back and forth all they want and post publicly all that they want. Use VPN or Tor and you're done.

make every nostr note as an OP_RETURN 😂 then everybody is happy 😂

Maybe citrea marketing plan to show how great op return can be 🙄

Sounds complicated 😄

I've said for a long time nostr relays should accept posts via OP_RETURN

nostr:nprofile1qqs9afryspzmk8ljyfj4mhfkumwwmhzrtyxzvzgvfp477w80g5x6t0g54u33x nostr is close to what you are describing. bitcoin keypairs, relays indexing by pubkey. i think the op_return crowd is after permanence, and relays do not give them that.