I fail to see how the cruise line can be held liable here. Take the same story and replace "cruise" with "hotel" or "shopping mall". The truth is that drunken sailors (or any drunken bunch of guys) can act in this manner. Just because its on a cruise ship, this shouldn't happen? Yes, it is unfortunate, but you can run into a bunch of jerks anywhere.
I'm sure if someone had said something, the ships security would have done something about it.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007, Celebrity Silhouette 2013