Same thing could happen if you point out a safety deposit box you're giving away with a pin of 00000000. It's not really about the number, because I can say 0 all day.
1. Ownership of the deposit box is not define by pin holders
2. Deposit boxes are tangible
3. Deposit boxes and contents have intrinsic value
3. Forgetting a pin doesn't effectively destroy the box and contents
4. The security of a deposit box is not defined by only math
I'm not trying to be pedantic, I'm just saying it is more complicated than that.