Found this thread...
http://www.disboards.com/showthread.php?t=2713199 about cruise ettiquette. Some good stuff on here, but does occasionally go off topic. I've posted some of the stuff on the FB page, and here's the run down for this thread.
■Never go up to the Captain when you see him around the ship and ask "Who's driving the boat"?....he's heard it a thousand times and it gets old quick.
■Don't leave your laundry in the machines and not come back for it.
■Don't leave your personal belongings on deck chairs to save them for later. They are for everyone and unless you are ready to use them don't leave stuff on them.
■Don't walk around the ship hallways in your bathing suit without a cover up and don't walk the halls in your nightie and curlers.
■Don't drape towels and clothing on the verandah railing (makes the ship look tacky).
■Always be polite when asking for something from the staff. Always smile and make eye contact.
■Be modest in your attire, not everyone needs to see every bump and bulge.
■Respect crew only areas (the ship is also their home and how would you feel if strangers were pushing their way into your living room).
■Don't sit in the first row at the show and doze off....people behind you can be distracted by your bobbing head and the performers won't appreciate people dozing during the show.
■Be discreet with your money and personal wealth. Nobody really cares and being ostentatious is in bad taste.
■When leaving your cabin don't let the doors slam.
■To be asked to dine with the Captain is an honor don't ever turn it down.
■There is a reason cruise ships don't sell gum....if you bring your own don't stick it where it does not belong (like on the floor or under furniture). Dispose of it properly.
■If coming back from muddy excursion, take off your shoes and carry them to room so you don't track mud through the ship
■Don't block the elevators, wait until passengers leave the elevator before boarding. If the elevator is crowded and you are in front when it stops, step out momentarily to let others off.
■If you encounter a problem seek out a crew member and discreetly explain the problem. Don't bore your fellow passengers with it.
■Keep a grip on yourself, don't over indulge in alcohol and be annoying to others.
■If the evening calls for formal attire don't change into shorts and t-shirt mid way through.
■Never use your hand to touch food on the buffets, always use the tongs provided (and don't put stuff back if you change your mind).
■Take a moment to commend the staff if you feel they have done a great job. A pat on the back goes a long way.
■If the sun shines smile, it is rains...smile and look for the rainbow!
■Don't be late to dinner. Your servers wait to take everyone's orders at once, so it's rude to your tablemates if you aren't there on time. It also makes it harder on the servers and the order of serving if you don't show up on time.
■If you know you will not be dining in the main dining rotation for dinner (you have Palo reservations or plan to eat at the buffet, etc) tell your waitstaff the night before. If you decide not to that day, try to swing by your assigned dining room at or before your dining time and tell the head waiter at the podium your table number and that you will not be dining tonight. Otherwise your table-mates and waiters do not know if they should be waiting for you or not.
■Use magnets (no tape) to decorate doors.
■Yes, please: No, thank you: Good morning: Have a good day: Good evening (night)
■Respect your fellow cruisers - they paid for it too!
■Respect your CMs, ask them about their homeland.
■If you order room service - call to have them pick up the tray when you are finished, rather than leaving it outside. This keeps the hallways clear and makes it easier for those in wheelchairs to get by.