I know this is a subject for the debate board, so I am going to try to post quickly to get this in.
Being a former OKW room assignor and having a lot of friends at MS, I know that MS is told specifically "you can book 5 people in a one bedroom as long as you inform the member that no extra bedding is guaranteed"
From a resort standpoint you can put as many people you feel you need to in a home and we don't care as long as you do not cause a noise disturbance for our other guests. We may only be able to cut you a certain number of keys, but it is sipmly not possible to enforce the ammount of people you choose to let into your room.
Also, I have never heard of anyone not being able to get and extra set of sheets a blanket and a pillow to accomodate an extra person in the room.