I am not sure if this thread will be locked, because it would be misconstrued to be flame baying, but I would hope that the mod who did close it (if it comes to that) would forward this (quietly) to the appropriate department.
Anyway, I think a good way to weed out some gold buyers (and ultimately sellers and bots) would be to investigate accounts of those suggesting the game go f2p and/or open up gold buying options through Zen. I am aware that this does not mean they actually are buying gold (hence the investigation), but these are most likely the people already engaging in this activity and just want a risk free way ;f doing what they already probably are.
Just a thought, take it or leave it.
Guildmaster of Decimation Elite
"Take all that you can, and give nothing back!"