Report is part of free speech. You can say whatever you want. People are free to react to it. And then everyone can react to reports.

Reporting is part of Nostr, not only amethyst. Many clients implement it and relays use it to delete users and posts. Amethyst just displays them for everyone to see. Hiding it won't solve anything.

On the warning side, you can disable warnings on the security filter screens if you don't like it.