Well. One of my teachers used to configure a shared network folder for us to upload our assignments when the class was finishing.
That was back when Windows allowed you to change the background of a folder, so every day I changed the background to a black image so he would not be able to read the file names.
He then learned how the wizard I was using to do it looked like [1], so he started to look at me when the class was about to end to yell at me for doing it. Therefore I had to use a workaround: I prepared a copy of the `desktop.ini' file that would set that black background and hid it around the disk drive, then I would just copy it to the "Incoming" folder :-) And it would just look like I was copying my assignment.
[1] https://i.imgur.com/2AQscKC.png