I dunno if it's because of atma quest but the only tells I've gotten in weeks are always on the field now. Have you found this to be the case?

Maybe I've blacklisted everyone in towns already.

Btw remember that you can click the name for instant blacklist. This simple tip improved the quality of the game considerably to me. At this point at least on Balmug RMT really isn't a problem of any relevance. Even to a player like me who's ALWAYS selling all kinds of goods on the MB.