the director of the writing program at the university where i work sent an email out saying that the school has retained a polygraph testing company to administer lie detector tests to students suspected of plagiarism, complete with links to the company and statements from the university's legal team... everyone on the list-serve FLIPPED out over it until he finally sent another email confirming that it was an april fool's day joke.
the school's newspaper published something announcing that due to construction, the subway line that runs through the school would be free for the day, only no one got the star trek reference they made and realized it was a joke, so we had students arguing with drivers all day for free fare.