Put tape over the optical sensor of someone's mouse.
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Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.
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Install the Blue Screen of Death screen-saver on someone's computer.
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Pull on a coworker is to press ctrl+print screen on their workstation, then paste it into Paint, save the pic, and set it as the desktop background.
Move all of their icons to the trash.
When they get back to their desk, clicking won't accomplish anything!
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How can yo tell if a black has been on you're computer?
It's not there...
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Take a squirt gun into the rest room stall next to someone and shoot little drops over the wall every couple of seconds while pretending to pee.
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I just recently discovered that there is a national holiday named after Atheism. April FOOLS day. Like this story in the name of Jesus.
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Change the coffee in the office coffee maker to decaf.
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Hide an alarm clock in someone's bedroom and set it for 3:00 a.m.
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Fill someone's hair-dryer with baby powder.
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Remove the shower head and place a chicken bouillon cube in it, then put the head back on.
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