Whenever my colleague at the neighbouring desk left her laptop unlocked, I would go in, and create a new Word document saying ALWAYS LOCK YOUR LAPTOP in huge red font. She vowed she would eventually get back at me.

I once took a screenshot of some random text in a Word document with “CONFIDENTIAL” as the background watermark and then I used that screenshot as my lock screen wallpaper. When I locked my laptop and left my desk, she clocked the content of my screen and thought it was finally her moment to get back at me, but… it wasn’t.