When I used to slave at walmart in the electronics department, i saw stuff like this..somewhat. Whenever someone would return a device, a member of the electronics department would have to go check it out and make sure it was all there before the return was approved. I recall someone returning a computer because it had a few bricks taped to the inside and was missing all the internals. Just an empty eMachine case.
Also, I had a customer come back with a copy of HL2 and told me the discs were all AOL start up CDs. I threw them in a computer..and they were. A closer inspection revealed the CD stickers were all just printed fakes off a home printer and placed poorly over the AOL branded CDs. I had to open 6 copies of HL2 before I found 1 that wasn't like this.