It makes sense if only one relay is down. Am I misreading your note? It mentioned that technically speaking if you broadcast the IP which you block listed (as spammers) to other relays, inevitably, those relays may block that IP too. In a nutshell, this method is not as simple as shutting one relay. But it means other users cannot use other relays after it receives your broadcast. However, I maybe misunderstanding it. Don't get me wrong, 💯 agree of getting rid of the spammers. I am only suggesting is the method above the only way? I'll leave this thought to you, the expert. 👌☺️