Hey guys, many of you were asking me yesterday what to do when you received a /tell or saw a shout by a RMT. Here's SE oficial response:

Having confirmed in-game advertisements for RMT* sites, we have taken the following actions to address this issue.
* RMT (Real Money Trade) is the selling of account or game data for currency in the real world.

Period: Aug. 24, 2013 to Sep. 5, 2013
-Accounts receiving disciplinary action for RMT advertisement: 518 Accounts -Action Details: Permanent ban from FINAL FANTASY XIV

In addition to chat filters, we will continue to address RMT activity through cooperation with our GM teams and STF (Special Task Force). If you are solicited by an RMT company in-game, please do not respond.

Among the accounts banned during our investigation, we have confirmed that many of these accounts were hacked. In order to protect your information, we please ask that you protect your Square Enix Account information. We also strongly recommend using the Square Enix Security Token to increase account protection.
For more information about the Security Token: http://sqex.to/em8

When you see an RMT advertisement, please file a report by using the in-game command [System Menu] -> [Support Desk] -> [Contact Us] -> [Report Cheating].

* What is the Special Task Force?
The Special Task Force (STF) is a team that works to prevent violations of the game's terms of service that would negatively impact FINAL FANTASY XIV. Their goal is to preserve the safety of the community and maintain an enjoyable play environment. More specifically, they handle issues related to RMT and the use of unauthorized third-party programs. Information collected by GMs will be analyzed by the STF, who will then take necessary actions against those who violate our terms of service.

Oh thanks for this, I wasn't sure if it was harassment or cheating so I went with harassment lol ^_^