come on people get a clue. These are allowed in this game for 1 reason and 1 reason only.
They are infact Employees of SE. They make real money by selling you their fake money.
A simple program to detect 3rd party software breech is all they need.
There is no way you can code a bot place it inside a world server and make if function without it being ( FLAGGED ) as security breech.
Look its just a basic code that all the devs have and they create bots to farm items then sell item on the Market to obtain GIL. The gil then gets sold by RMT's.
These RMT's are not beeing banned at all. Matter of fact i have 156 black listed accounts and only 15 have been deleted. These 15 were RMT's not of the SE family.
