If you mean the RMT spam... yes, it is excessive but Square is doing the best they can given how fast these RMT keep making new account after new account. You said it yourself, you filled your blacklist in less than a week yet still it's an incessant issue. The problem isn't that Square isn't doing anything, they have a team dedicated to just RMT, the problem is that the RMT even has a customer base to make all the efforts they're going to worth it. It's these gil buyers that are to blame. My solution to the RMT spam was to devote my fourth chat tab to only /tell. I can still see if I've received any /tells but it's not clogging any of my more active tabs.