Maybe it's Osama attacking idle Americans on their leisurely cruises. After all, whoever this one person is, they would have to have enough funds to keep purchasing tickets on all of these cruises!
8/92 Mex. Riv. Commodore
9/98, 9/00, 9/02 & 7/04 Caribbean - Paradise
10/00, 08/05 Pac. Wtrs. Holiday, Monarch
04/06 Hawaii - Celebrity Summit
09/07 Alaska - Celebrity Summit
07/09 Western Caribbean RCCL Liberty of the Seas