NCL if they find them will hold them until you get off at a port. I know 4 people who took their drones on cruises. Nobody had any issues bringing them onboard in checked luggage. Two got "caught" returning first port day, two never got caught. Its pretty simple, the cruise lines put this into place because they did not want some idiot flying a drone on the ship while it was underway. Yes you can go to YT and see a couple of this idiots at work, one guy even lost his Phantom because it could not make it back. Just use some common sense.
And yes, I'm leaving on a 14 day cruise soon and I will be taking my MP