Straight down to business here, this is 100% about RMT spammers. The black list, ideally, shouldn't have to be used to manage RMT sellers and SE would have some method in place to detect and stop RMT spammers (really shouldn't be too hard to have some kind of /tell flood detection to halt messages but w/e, I'm not their engineer and I don't know their limitations). But the fact is that it's my only way to deal with them. If SE can't figure out how to halt or limit RMT spammers, then at least make it easier for us to use the tools we already do have to deal with them.
The first problem with the black list is that it only holds 200 names and I add 10+ names a day. Second, it is not easy to clean up and remove names from the black list. Each name has to be removed individually and each removal takes 2 clicks. We need to be able to mass-remove names, or have one click removal, or something. The time I have to devote every single day to 1) Add names to my black list and then 2) Clean up the black list so I can keep adding names is ridiculous and always has been ridiculous. But what I find the most ridiculous? Is that there's been no improvement made at all over the past year.
It really really effects my enjoyment of the game. Please, SE, please please please spend some resources into mitigating the RMT spammers. If you can't figure out how to stop them from sending me tells up front, please make it easier for me to manage my black list. I'm having to work too hard to deal with and manage something that has nothing to do with playing the game.