Honeslty, you are giving deer too much credit here. I also feel that a lot of what you are referring to is the exact reason to have multiple set-ups. If I get sighted in the tree from a stand, then I won't hunt it for a couple of weeks. I will just hunt one of my other stands in the same general area. This isn't rocket science, and if you spook a doe your season isn't over.

On a related note, over hunting a stand can be damaging even if you are not seen in the tree. The scentsyou leave behind, etc will allow a deer to figure out where you are.