I learned my lesson years ago on my first cruise. Seems most doors on ships have industrial pneumatic "closers." On our last cruise, the people next door slammed their balcony door on the first day. I thought to myself, "Well, I hope they learned their lesson." They didn't. Morning, noon and night, when they either went to their balcony or came back in, the cabin walls would shake when they closed the door. I concluded they weren't the brightest lights on the Christmas tree. There is no cure for door slammers much like there isn't a cure for chair hogs.