I love it when good, common sense policies are enforced. The worst abuse I ever saw was on the Carnival Elation in June 2011, a woman got on the ship on embarkation day at about 11:20 and then proceeded to place personal items on 16 deck chairs right next to the pool. Those chairs were saved right up until dinner time and only 4 of them were ever occupied. The others just sat empty the whole day. What a waste.
I sure hope it works.