I've just Banned the sentence GM, from.. 

 Banned my own note too 😂 

 Those bot rug our right to post GM, from forever 

 not sure you can ban but you can mute it in some clients 

 nostr:note1nftdqevhgf8vvkz7l58g9tfwhfa8cjr7xq6lng9ydyvxvq6ky6lqx4kzpe