There are some truly funny ideas here. A few I will add to my list of "must do's" Hahahahaha
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Best ideas I can think up at the moment that I've done or participated in:
* Try "password securing" someone's screen saver. First I suggest changing the screen saver to "scrolling marque" and inserting your own word or phrase, "Mr. Jones (president or supervisor) eats SHlT" or something to that effect.
* Phones with handsets:
The handset comes apart. Take the handset apart and put scotch tape over the mouthpeice inside. They can still be heard, but they have to talk loud to be heard. The next day take it off, and put it in the earpeice. Usually they will be yelling to the other person on the line the next day, and won't be able to hear them. When they complain about the phone, and get a replacement, do it on the next phone. After about a week you will notice the calls to be down considerably.
* Put a peice of onion or a clove of garlic inside the mouthpiece of a phone. Give it some time for it to fester and build up a strong odor. Then call them.
* When someone forgets and leaves a Word document or an email open, type a single word somewhere in the text. “f*ck” or so will do nicely. They’ll never notice and send it out.
* Take clear tape and tape the underside of the mouse. Make sure you take the sticky end of the tape and apply it to the bottom of the mouse so it locks the ball in place. The victim will most likely check the connections in the back, reinstall drivers, reboot, etc., before they realize what has happened.
* Do a "Print Screen" of the user's desktop, and then paste the image from the clipboard to a photo program, and save the image as a bitmap. Then, set the 'snapshot' of their desktop as the actual desktop wallpaper. (You'll have to hide the Windows status bar, and move all their desktop icons into a folder, which you can hide conspicuously in the corner or something.) Your co-worker will see their desktop as always, but everything on it will appear to be frozen when they try to click on it... sending them into a rebooting and virus scanning fit!
* If your co-worker gets personal e-mail all day. Go into their e-mail and change their defaults to automatically "blind carbon copy" their boss or supervisor.
* Go into MS Word or similar program on co-worker's computer, and add an entry to the AutoCorrect feature. This is a very simple prank that will send the novice user into a frenzy. Configure the AutoCorrect option to replace the word "the" with the phrase "you suck!". They will usually panick and start scanning for viruses.