Two paragraphs that made me laugh were-
"Metal Detectors: Guests are not permitted to use metal detectors on board because anything found on board would "belong" to Carnival Cruise Lines. We would then try to return the item to the guest."
"Fish Caught on Fishing Expeditions: The fish cannot be brought on board; it must be shipped home."
I suppose that one time or another people tried to do both.
What about fishing off the stern? Can I reel in my catch & then ship it off at the next port?