It seems like best etiquette would be to have a username with "bot" in it and include something in the post explicitly indicating it's a bot (e.g. a signature).

This isn't even a new problem where a good cultural solution hasn't been figured out yet. Reddit has had bot etiquette for years.

In case anyone doubts it's AI-written: https://www.pangram.com/history/b7433cbe-08e7-43fe-9a32-3e43...