This morning, Square Enix released an announcement pertaining to their actions taken against a malicious third-party program creator and any users of said program, as well as any actions that will be taken in the future in regards to other programs that give unfair advantages to players.

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From Playonline.com:

Over a period of time, we have been monitoring an individual responsible for the creation, sale and distribution of 2 third party tools in violation of the rules of the FINAL FANTASY XI service and various state and federal laws. The tools were utilized by players and gil farmers to gain an unfair advantage over other players in a variety of ways. As a result of our investigation, we have taken appropriate action against the individual, have halted distribution of the programs and have disabled the servers used to run them.

We are in the process of investigating other third party tools originating in the U.S. and abroad and will take similar action against the creators and their customers when we are ready to do so. We have a zero-tolerance policy against any attempts to artificially manipulate FINAL FANTASY XI gameplay or the PlayOnline service. Usage of third-party tools will not be tolerated within the FINAL FANTASY XI community, and we will continue to ban user accounts for consumers of these products and will potentially take legal actions against those who create the tools.

We would like to remind players that, in addition to adversely affecting game balance, using third party tools or cheats can also have potential consequences that are not immediately obvious, as they often contain damaging viruses and Trojan horse programs, which may result in the transmission of account details.

We continually strive to create a fun and balanced environment for FINAL FANTASY XI, and we hope that our efforts ensure that our players continue to enjoy the experience.

Thank you for your continued cooperation and understanding