That's correct. It's a spammer abusing the open nature of Nostr.
Discussion
go to poster.place, click on any profile, and see the nice button we have at the bottom to solve the spam crisis
So why does removing those 3-4 relays seem to eliminate the reply guy replies? Is it because the spammer can't see my message being posted to the relay and thus clone it?
They are only targeting those relays it seems and/or those relays aren't doing much to stop them