On one of my cruises, I was walking through the hallway... (oops!) *"PASSAGEWAY" when I saw a bunch of mattresses wrapped in plastic lined-up along this passageway. They looked like they were brand new. Later that evening, some of my fellow tablemates at dinner mentioned that they also saw these same mattresses in the passageway, and thought it was strange to change-out mattresses in the middle of a cruise while out at sea. I had a sneaking suspicion that it was for the topic of this thread. I had it on the tip of my tongue and I wanted to mention it to the tablemates at that moment, but I decided not to.
Bed Bugs were almost irradicated in the 1970s thanks to the miracle insecticide "DDT". But ever since they banned the chemical (for good reasons), Bed Bugs have returned with a vengence. Unfortunately now, wherever you travel (on a cruiseship or hotel), you have to beware of them.