He/she just diaga AB pulls in korroloka tunnel. I search about how to stop him and I found something:
"The GMs are available to assist players whenever an issue may arise during game play. The following are examples of situations players have encountered.
* Another player is causing a disturbance and a violation of the user policies (*1)
--Behavior meant to obstruct the play of others (griefing)."
So if you get your AB party diaged just send a GM call with that.
http://www.playonline.com/ff11us/rule/support02.html?pageID=support