One of my students works at a regional mega-store (clothes, grocery, electronics) who is pretty much Walmart's competitor. He quit his job this past weekend because he got tired of the crap they put their employee's through.
Anyways, the latest draw was they wanted him (all employee who do stock) to sign an NDA "of the contents of the storage areas". He signed it and then they had him help unload/shelf a bunch of stuff.
Turns out, their company policy is that whenever there's a shipment of Wii's, they are only allowed to put ONE box in the glass case. He asked about why and was told it's because they want to always be able to show that they have the Wii in stock for advertising regulation.
So, if they say they don't have any, tell them you know they're supposed to keep most in the back and to go get one.