This is one I made and put on a school computer, that wasn't a smart idea on my end
[snip]
When I was in high school, my school got in a batch of brand new Apple IIgs computers.
And I had one at home, so I knew how to get into the system and change things.
So one day, the teacher came into the computer lab, and I'd changed all of the screens from blue with white text to black with orange text. (our school colors).
I got sent to the Principal's office, and got the "That was a very naughty, naughty, naughty, clever thing that you did."
Basically: Don't upset the teacher, she complains too much.