The simple answer to your question is yes, I feel there's more wear and tear and thus higher dues and have some indications of that from other timeshare directions as well. Obviously one slob can cause more damage than 5 well behaved people so it's the aggregate issue over time. The real question is whether 5 well behaved people cause more damage than 4 (or whatever variation you want to consider). And the answer is yes and MORE than just 20% more damage. And since there are rules involved with legal implications, I don't feel anyone should have the right to pick and chose which group is OK to go over and which is not. It is also my opinion that ON AVERAGE, those willing to stuff the room are less likely to take care of it.
Some will say there are other things that also cause increased wear and tear and while that's correct, IMO, it has no bearing on this discussion unless it's directly related to this issue. And all the factors that would have a direct relationship to room stuffing that I can think of would be on the negative side, not the positive.