IF they make their money from the markets you can blame them for low gil! Man these guys sell 100'ds of crystals then get banned that gil is forever lost from the player base QQ.
just kidding but that sounds somewhat relevant now that i think about it. SE is taking measures to combat gil sellers, if you are honestly concerned and really do care about it to the point of wanting it gone, the best thing you can do is report. they DO get banned. do your part to help stop them and let SE work out their system and take care of it. trust me they want them gone just as bad.