Megaupload is an online file-sharing service that enables users to upload files to a service, and then for other users to download those files. It was started by young people with the idea of copying YouTube, and has transgressed into allowing people to anonymously transfer large files, such as movies, TV shows, and music.
Megaupload has been accused of making more than $75 million in advertisements and subscriptions, and causing $500 million in damages to copyright owners. On January 12, 2012, the FBI shut down the site based on the investigation of copyright infringement. Citing Internet piracy, the FBI charged 7 people whom they believed were connected to the creation and start of Megaupload.
The full indictment is available online.