Did you know that having the balcony door open and letting the door to the hallway slam can cause damage to the next door cabin because of the change in air pressure?
I learned this the hard way (I was in the next door cabin).
Our last cruise we were in a balcony cabin. The idiots next door left their balcony door open (even when not in the cabin). SLAM! SLAM! SLAM! SLAM!
This was after repeated statements in the daily paper and by staff that balcony doors were not to be left open.
Came the day we had an apparent wind speed of 37 MPH that was hitting the starboard side of the ship at a 45 degree angle (we were port side). (As per TV Navigation Channel)
The fools slammed the door into the hall. I watched our cabin wall next to their cabin bow inward. I thought the mirrored panels on the wall were coming down.
They didn't, but the cabins on that wall had three doors that were knocked crooked and one shelf in a cabinet fell from its mounts.
I immediately went to Guest Services and reported the damage (I was hoping that they wouldn't assume that we, a couple in our seventies, had been indulging in wild monkey sex).
A crew member responsible for all cabinetry on board ship was at the cabin within ten minutes. He rehung the doors, remounted the shelf , and carefully inspected the other cabinets and the cabin wall. He also entered the cabin on the other side of the problem cabin to checked for damage.
Guest Services called after he made his report of the damage. The wall had damage but was not an immediately hazard. It would be fixed on turn around day.
The balcony door next door was permanently locked for the remainder of the cruise (Head of Housekeeping and Head of Security visited the cabin next door to speak to the occupants and lock the door).
The damage to our cabin was caused by the rapid change in air pressure in the cabin next door . In addition to the normal problem of the higher air pressure in the cabin compared to the hall that causes the problem when the balcony door is left open even in calm conditions, the problem was exacerbated by the high wind condition and the fact that the wind was hitting and moving along the opposite side of the ship, thus lowering the air pressure on the outside of our side of the ship (physics - think air moving over and under an airplane wing).
The explosive change in pressure was transmitted through the walls.