Keep in mind this is the same WalMart that you can time and time again walk into with old VHS tapes (as long as the box looks okay) and say "I bought this as a gift for someone, and they already had it, can I get store credit for the return?" and will be met with smiles and money every time. I have little doubt that the stoned kid at the photo desk is going to remember yesterday, let alone a new rule saying "watch out for good photos."