Tell filters don't work though - SE already tried that years ago with FFXI and... it worked for... a week. Then the RMT companies worked out how the filter functioned, and developed ways around it (such as substituting letters in the tell that the filter would block, such as replacing 'w' with "@' in web addresses and mentioning that fact in the tell so that prospective buyers would know where to go anyway.)

And even if they restricted tells to only being able to be sent to people on your friend list, would then cause RMT to assail players with friend requests and cause even more annoyance. It's a zero sum game that SE can't win. No matter what SE might do to stop or limit them the RMT companies will find ways around it, and it only just ends up hurting players in the long run.

Really, it should be the stupid 'people' who actually buy this ill-gotten gil who are the targets of your ire not SE. If people didn't buy gil then there would be no RMT, it's as simple as that. SE are doing all they can to halt this insidious trade. Don't you think it negatively impacts on them as well?