One of my favorites was to open the frame buffer on a Unix workstation, then logout leaving a background job running.
A little after someone logged in, the code would do something cute, like draw a crack on the screen. I once saw the guy next to me back away from the computer, and ask, "It's not supposed to be doing that is it?"
Perhaps not quite black hat, but I was amused at least. :)
A little after someone logged in, the code would do something cute, like draw a crack on the screen. I once saw the guy next to me back away from the computer, and ask, "It's not supposed to be doing that is it?"
Perhaps not quite black hat, but I was amused at least. :)