I experienced one of the worst cases of this at a local building supply store. We went in looking for stainless screws. We could not find any stainless hardware
, and asked one of the clerks. He took us to the nail isle and started pointing out boxes of nails, asking if that was what we wanted. I explained we wanted screws made of stainless steel
. He looked at me like I was from another planet, and pulled a box of sheet rock nails (not screws) off the shelf and handed them to me. I politely explained that these were still not screws and left. I really makes you wonder.