The "American Way" is often to sell you anything, lie about it if needed, deny any liability, but take your money. I am surprised that a WalMart mgr allowed such a thing as planting and verifying; also surprised that the person was still the mgr a year or more later.
My solution is to avoid all the doubtful places; if they get no sales for suspiciously labeled items those items will be pulled off the shelves.