"Hey, are you going to leave these here in the hopes some unlucky bastard buys them anyway?"
He turned and walked away like he hadn't heard me. (I am neither shy nor quiet)
Bad enough the store is the victim of theft/fraud. I would think they value their own reputation enough to correct the situation when it is pointed out and seemingly understood.
I work in WalMarts, Targets, Fred Meyers etc as a representative for another company. If you have ever felt sorry for them and what they have to "put up with" Don't. As customers, they are the most demanding, rude, and outrageous SUMSABEETCHEs you could ever imagine. I encourage everyone and their dog to be just as entitled and demanding of the store's.

