The classic «Inside-Out» case.
I just read Harry Brignull’s latest Post on the story behind the puzzling Ctrl + Alt + Del combination to log-on to Windows.
Dave Bradley, the inventor says: «I was just trying to solve a development problem we had.[…] I originally intended for it to be an easter-egg, just something we were using in development.[…] It was a five minute job. I didn’t realize I was going to create a cultural icon when I did it.»
And this is how millions of novice Windows users ended up learning very quickly where those keys are that nobody ever uses.
If you are not the world-dominating provider of operating systems something like this can seriously hurt or even kill you. How to avoid it? Put your users on center stage.