One of the biggest reasons that people go on cruises is to set aside the restrictions of their regular life and seek out pleasure, excitement, relaxation, and entertainment. This might mean laying out all day on deck, drinking only alcohol, and gorging themselves at buffets. It could involve going to every show offered on the ship and staying up all night partying. Some people hit the casino and never look back. And others want to get in as many adventures as they can by going on excursions.

While most of these activities aren’t expressly “illegal” on land (with the exception …