From the Museum of Hoaxes (http://www.museumofhoaxes.com/hoax/aprilfool/index) here are a few interesting April Fool's Day Hoaxes:
1996: The Taco Bell Corporation announced it had bought the Liberty Bell and was renaming it the Taco Liberty Bell. Hundreds of outraged citizens called the National Historic Park in Philadelphia where the bell was housed to express their anger. Their nerves were only calmed when Taco Bell revealed, a few hours later, that it was all a practical joke. The best line of the day came when White House press secretary Mike McCurry was asked about the sale. Thinking on his feet, he responded that the Lincoln Memorial had also been sold. It would now be known, he said, as the Ford Lincoln Mercury Memorial.
#4: The Taco Liberty Bell
#4: The Taco Liberty Bell
#8: The Left-Handed Whopper1998: Burger King published a full page advertisement in USA Today announcing the introduction of a new item to their menu: a "Left-Handed Whopper" specially designed for the 32 million left-handed Americans. According to the advertisement, the new whopper included the same ingredients as the original Whopper (lettuce, tomato, hamburger patty, etc.), but all the condiments were rotated 180 degrees for the benefit of their left-handed customers. The following day Burger King issued a follow-up release revealing that although the Left-Handed Whopper was a hoax, thousands of customers had gone into restaurants to request the new sandwich. Simultaneously, according to the press release, "many others requested their own 'right handed' version."
#6: Nixon for President1992: National Public Radio's Talk of the Nation program announced that Richard Nixon, in a surprise move, was running for President again. His new campaign slogan was, "I didn't do anything wrong, and I won't do it again." Accompanying this announcement were audio clips of Nixon delivering his candidacy speech. Listeners responded viscerally to the announcement, flooding the show with calls expressing shock and outrage. Only during the second half of the show did the host John Hockenberry reveal that the announcement was a practical joke. Nixon's voice was impersonated by comedian Rich Little.
#11: UFO Lands in London1989: On March 31, 1989 thousands of motorists driving on the highway outside London looked up in the air to see a glowing flying saucer descending on their city. Many of them pulled to the side of the road to watch the bizarre craft float through the air. The saucer finally landed in a field on the outskirts of London where local residents immediately called the police to warn them of an alien invasion. Soon the police arrived on the scene, and one brave officer approached the craft with his truncheon extended before him. When a door in the craft popped open, and a small, silver-suited figure emerged, the policeman ran in the opposite direction. The saucer turned out to be a hot-air balloon that had been specially built to look like a UFO by Richard Branson, the 36-year-old chairman of Virgin Records. The stunt combined his passion for ballooning with his love of pranks. His plan was to land the craft in London's Hyde Park on April 1. Unfortunately, the wind blew him off course, and he was forced to land a day early in the wrong location.
#24: Drunk Driving on the Internet1994: An article by John Dvorak in PC Computing magazine described a bill going through Congress that would make it illegal to use the internet while drunk, or to discuss sexual matters over a public network. The bill was supposedly numbered 040194 (i.e. 04/01/94), and the contact person was listed as Lirpa Sloof (April Fools backwards). The article said that the FBI was going to use the bill to tap the phone line of anyone who "uses or abuses alcohol" while accessing the internet. Passage of the bill was felt to be certain because "Who wants to come out and support drunkenness and computer sex?" The article offered this explanation for the origin of the bill: "The moniker 'Information Highway' itself seems to be responsible for SB 040194... I know how silly this sounds, but Congress apparently thinks being drunk on a highway is bad no matter what kind of highway it is." The article generated so many outraged phone calls to Congress that Senator Edward Kennedy's office had to release an official denial of the rumor that he was a sponsor of the bill.
#75: World to End TomorrowOn March 31, 1940 the Franklin Institute issued a press release stating that the world would end the next day. The release was picked up by radio station KYW which broadcast the following message: "Your worst fears that the world will end are confirmed by astronomers of Franklin Institute, Philadelphia. Scientists predict that the world will end at 3 P.M. Eastern Standard Time tomorrow. This is no April Fool joke. Confirmation can be obtained from Wagner Schlesinger, director of the Fels Planetarium of this city." The public reaction was immediate. Local authorities were flooded with frantic phone calls. The panic only subsided after the Franklin Institute assured people that it had made no such prediction. The prankster responsible for the press release turned out to be William Castellini, the Institute's press agent. He had intended to use the fake release to publicize an April 1st lecture at the institute titled "How Will the World End?" Soon afterwards, the Institute dismissed Castellini.
#71: Michigan Shark ExperimentIn 1981 the Herald-News in Roscommon, Michigan reported that 3 lakes in northern Michigan had been selected to host "an in-depth study into the breeding and habits of several species of fresh-water sharks." Two thousand sharks were to be released into the lakes including blue sharks, hammerheads, and a few great whites. The experiment was designed to determine whether the sharks could survive in the cold climate of Michigan. The federal government was said to be spending $1.3 million to determine this. A representative from the National Biological Foundation was quoted as saying that there would probably be a noticeable decline in the populations of other fish in the lake because "the sharks will eat about 20 pounds of fish each per day, more as they get older." County officials were said to have protested the experiment, afraid of the hazard it would pose to fishermen and swimmers, but their complaints had been ignored by the federal government. Furthermore, fishermen had been forbidden from catching the sharks. The Herald-News received a flurry of letters in response to the announcement.
For the full list of the top 100 April Fool tricks click here.