Haha! I remember when I first got access to X-Windows terminals and how easy it was to start an image viewer on someone else's display because xauth was not yet

Haha! I remember when I first got access to X-Windows terminals and how easy it was to start an image viewer on someone else's display because xauth was not yet a thing. This was a lot of fun :) There was also xblaster or xblast or something that would turn the victim's mouse pointer into a crosshair and when clicked would shoot holes into their windows which would not disappear. You could actually see the windows underneath them. They implemented xauth pretty quickly though and that was the end of that. Thanks "MIT Magic Cookie". Never found out why it was called that.