This should not happen. Clients should at least respect user relays, and if they are good, they will support NIP-65. Without NIP-65, there will only be a few large relays that can censor users.

Honestly, what would be the great dream-like amazing UX for this in the legacy web platforms? The Zapstore website would have a random "comment with Facebook" embedded. And in the comments no one would know who is the app author responding to comments from other randos because the identities would ...

Standard nostr UX today, amazing UX tomorrow. Growing pains to design what we believe is best.