We do this sort of stuff to each other at work all the time, to the point that I'm afraid to come back from a personal day...we are all on Macs so we do lots of Mac tricks to each other, but I love the idea of doing this to a PC co-worker, what an awesome concept!!
We should open a forum that just talks about tricks you can play on each other either Mac to Mac or Mac to PC, etc.
Some of my best tricks to others as well as ones played on me are: (yes, I admit, it's a bit sadistic!)
-removing the ball from the mouse
-the classic "screen shot" of the desktop so when you click on your desktop icons, nothing happens
-changing the screen font from Geneva to something like dingbats or chinese characters and making the default size 24pts. (this is a really good one bc u have 2 really know your way around the contol panels and OS to change it back since it's no longer in "English"
-taking the desktop icons off the screen and putting them inside a folder with a desktop icon that normally would launch a file, like a PDF form
-putting the "Hampster Dance" audio file in the startup items (in the extensions on OS9) so that when the computer starts up it plays the song (really loud--system volume turned all the way up!!)
Sacres the beejesus out of you!!
oh, how do we torment thee, let me count the ways!!
So, anyway, I got a vaction coming up...any new ideas for my next retalliation???