Nothing users do surprises me anymore
Back in the early nineties when the Office of Corrections embraced IT and decided that every Prison Governor would get their own laptop, DOS 6.2, WordPerfect and Quattro Pro* on a basic Compaq with a trackball attached to the side I was often called into the boss's office to explain the finer points of computers eg, how to turn it on. One day he was complaining that he couldn't read files from the "things Spock is always walking around with in Star Trek." Sure enough the disks, a whole 10 pack, proved to be unreadable. While tapping one on my had while trying to think what Moby had done I noticed a slightly roughness on the back of the disk, looking I discovered a hole with a raised edge, turning it over I found a smooth hole on the front. Checking all the disks they had the same hole. I had a sinking feeling at that point, so I asked him a question, Sure enough, El Supremo had been pinning his disks to his cork board at home.
*Moby, why is there a golf sim on your official not to have any unauthorised software government issued laptop? A golf sim? I have no idea how that got on there