I store them in boxes the height of the deck. So they end up getting folded forward onto the deck. I don’t crease them though, if that makes sense. They just get stored that way for so long it’s the way they are.
you can kind of see it here: https://imgur.com/6ldUyxQ
As a collector/buyer. The condition of the plastic hang tag would make no difference to me. I guess I rather have it left alone, but it wouldn’t really affect the price I would pay.
If I got a deck where it was cut with scissors, I’m anal enough to take a pair of fingernail clippers to it to round out the sharp points, in case it ever poked another deck.