SE posted this today:
"We are currently investigating players who
advertise power leveling services via Shout/Yell, collect gil from the
participants, and then use that gil to engage in RMT-related activity.
Our investigations thus far have revealed that these players regularly
advertise in the Jeuno area and we have responded by terminating the
FINAL FANTASY XI service accounts of those found guilty of this
Please be aware that advertising in such a manner in
itself can be disrupting to other players and we may take action against
players who continuously advertise for the above kind of parties. This
also includes behavior that helps facilitate such activity. Please take
caution in not supporting RMT-related activity.
In addition, if
you witness other players engaging in this behavior, please report the
details to the Special Task Force via the Square Enix Support Center."
The Fell Cleave parties are illegal outside the scope of RMT, on the basis of Absentee Play.
Also, since we're looking at very serious Level 99-Extra content (based on the gear and the like), it may no longer be sufficient to be Level 99 and actually do anything within the game.
Hence, even participating in the FC groups is disruptive to the game. Unfortunately, this means that even non-RMT FC players (both advertisers and participants) need to be removed.