Yeh they x-ray your luggage, cruisingmama, but they are looking for bombs not booze. Besides, even if they take it, they give it back at the end of the cruise. So you'd have to buy drinks instead. no big deal.
Big difference between bringing a bottle on board and harrassing a innocent passenger, kiku. They CHECK luggage and carryons, so they KNOW about the booze. If they let u keep it, then they are allowing u to. Nobody gets hurt. Silly comparison.