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6. Warner Bros. acquires The Pirate Bay
TorrentFreak said in 2009 that, amid piracy suits and counter-letters from the rogue file-sharing site, that Warner Bros. had acquired The Pirate Bay in a deal worth $13 billion. It was of course a prank pulled in good humor by the piracy-enabling site, used by millions worldwide to download the latest movies, music and television. Oh, and porn. Lots and lots of porn.
7. CatBlock blocks ads with cats
Millions use AdBlock around the world to block annoying Flash and image-based advertisements on websites. For April Fools' Day, the creators of the popular Chrome and Safari plugin replaced ads with pictures of cats -- transforming some of the most popular sites on the Web with kitty-based imagery. But the prank was such so successful that it was spun out as a separate project and made available to the public.
8. Hulu jumps back to '1996' era
Hulu has alwas kept ahead of the technological curve, except for April Fools' Day 2011 when the site reverted back to how it might have looked in pre-Web 2.0 days. With older fonts, such as Times New Roman, and poor graphics and animated GIFs, along with two buttons at the bottom for Netscape and Internet Explorer, the video streaming network pulled off a prank that likely made many to think back to the warm and comforting days of CompuServe and AOL.