When I was a teenager I wrote a simple visual basic app to globally detect the letter 'e' and immediately send a [backspace] to whatever application the user was working in. It was a background app and named something like system32.exe which I installed on my girlfriends computer. The frustration she endured while trying to write an essay for school was next level. I faked trying to help her :D She eventually resorte…
Hewlett pulled a similar prank on (P)ackard and they are still together.