This scenario has happened to me several times, and each time it makes me irrationally annoyed.
Today’s example was;
I went to Home Depot to buy some electrical supplies. I bought two “Old Work”
electrical boxes, along with a bunch of other stuff. When I got back home, I started to work on my project, and after cutting the hole in the drywall and inserting the box, I noticed that the bottom screw wasn’t clamping the box to the drywall. I pulled the box out of the wall to figure out what was wrong, and found that someone had stolen the little “flag” that the screw fits into, and put the box back on the shelf. Fortunately, I had bought another one, so I was able to finish the project, but the combination of petty theft, and the casual disregard for the next guy (me) who buys the no-useless product really gets my goat.
I am usually pretty wary of packages that look like they have been opened, because I have see hardware missing from them on occasion, but I didn’t think to check the boxes.