Originally Posted by Zeek
Because they will be in the background instead of just that stand being there all empty. Same goes for the ribbon, but I'm not sure about the calender.
I really don't think that's an Easter Egg or feature... the cutscenes aren't pre-rendered, so whatever was in the background initially will stay in the background. It's like saying the animation of Sam and Max walking out the door is different every time based on if you already picked up items from the background...