Touche
BTW, sorry if I offended you. I'm not trying to argue. I just though my analogy of "no ground cloth = no underwear" was sort of funny too (guess I'm not very good at being funny).
I think everyone would agree that a ground cloth adds protection but also adds weight. Different types of ground cloths provide different types of protection. We each evaluate a combination of the conditions we face, the costs involved (monetary and otherwise), and our comfort levels and all come up with different solutions.