Yes, people do that often. I bought a box of stuff to fix my bathroom sink and took the box a "helpful" clerk handed me. Turned out it was missing a lot of stuff that the list on the box said was inside. They took it back and the older man who helped me looked around and then suggested that I get boxes from the back of the shelf, and make sure it hadn't been opened. This was at Home Depot. Never saw that younger helpful clerk again. I have no idea of what was happening...but I will go there again since they are so nice about helping an old lady.