Is there any Nostr client that'll tell you "Which Relay relayed this garbage 'reply guy' spam to me?" or more helpfully, just allow you to right click on any note and tell you which relays it was that relayed it?
Discussion
Coracle for desktop does it.

Yes, how do we kill it? I mean... 😅
I can block it but it van still comment on all my posts, right? I started reporting them as spam but I'm not sure what that does exactly.
I guess swapping relays might be better, but I don't understand how to do that part yet. 😇
Amethyst does
the solution is NIP-13
high reputation relays should establish a min PoW threshold to mitigate spam
I do "mine" my notes whenever I'm at desktop using nostrudel.