Fine print: This is not a real virus. Your computer is fine. The only thing infected is your trust in IT support. Happy April Fools! Before you hit "Send," you need to ask yourself one question: Is this funny, or is this mean?

In the digital age, the art of the prank has evolved from whoopee cushions and plastic vomit to something far more sophisticated (and arguably more terrifying): the prank PDF file .

So go forth. Create your masterpiece. Make it absurd. Make it harmless. And whatever you do—make sure you include the uninstall instructions on page 42.