In my all honest opinion, the problem lies squarely on the PLAYER BASE not SE. Sure SE has the burden of having come up with a solution to this problem. You would need to be dense to say they are not doing anything about it. Coming from FFXI, it took some years from the creation of the STF (Special Task Force) to finally cause the gil spamming shouts in Jeuno and tell spams to stop. Of course they implemented anti-RMT measures in FFXI that helped curtail the RMT activities, which I'm sure they implement here. If you like to know what some were, research them.

But at the end of the day, this all falls on the player base. STOP BUYING FREAKING GIL.

I'll go even further, I have a total of 4 characters, two each spread out between the NA and JP data centers. Guess which two get spammed day and night with gil spam, guess which two I had to rearrange the chat logs so only tells appear in it's own log, and guess with which two I have to deal with over priced items on the market board.

By this I don't mean to excuse the japanese player base, cause I'm sure that they are those that buy gil.