[TubaMorg]

As both a victim and an instigator of practical jokes I heartily approve of this one! The hallmark of a good practical joke is that no real harm is done. Which means, of course, that implementation of the BSOD screen saver joke would have to be closely monitored. I know plenty of people who's first instinct would be to "do a clean reinstall of the OS". You just don't want someone to unnecessarily clear their hard drive! Speaking of Macs, two guys I work with (we are all getting our phd in computational Biology), are always slipping crazy Mac jokes on to each other's computers.

Examples:
1. Screen shot of Desktop set to background (simulates a locked computer since none of the icons work! Key is to place all desktop icons into a hidden folder)

2. For laptops, Macs have a motion sensor. Install the program that sounds a "car alarm" when the Mac is disturbed.

Again, though, any joke that simulates a broken computer needs to be closely supervised to prevent accidental hard drive cleaning. If you can't be there don't do it!