Trion Worlds has made a post on the official ArcheAge forums regarding a server first kill of Leviathan boss by the guild called "Rage Quit". According to reports of other players and the summary by forum moderators, the guild utilized an exploit to complete the kill. As a result of taking advantage of the exploit, all members participating in the event got permanently banned, the guild has been disbanded and all loot gained has been removed from the world.
In reviewing all of the contacts we received regarding this kill, no member of Rage Quit stepped forward to inform of us the exploit outside of one, who we will discuss in a moment. Had a member of the guild or Scottyz, their guild leader who was present for the kill, stepped forward to contact us and let us know about this issue, our decision would be very different. Instead, the guild claimed the loot, made use of the loot (outfitting the galleon, for example), and made no effort to contact the staff. Scottyz, for example, is still personally holding onto a piece of the treasure.
Read the entire discussion based on Trion's response on the ArcheAge forums.
You can take a look at the kill by checking the video below.