It is not secret that MegaUpload, as all file sharing sites, was used to share pirated material. The same happens in video sites like YouTube and any other technology like BitTorrent. Users tend to share anything in every opportunity but this does not means that every technology and every site is responsible for that. If anything, this way of thinking makes sites more popular. MegaUpload was shut down with no warning and users lost their files without knowing when and if they will ever retrieve their files. There is a huge number of MegaUpload users that were not sharing pirate data and those people want to sue FBI. Among them are scientists that were sharing their results, people that were sharing their work documents and many people storing and sharing their personal data and videos.
Pirate Parties from all over the world are making lists with all those inocent people that were affected with the MegaUpload shut down. When they finish gathering the names of affected people, they will file an official complaint against FBI and U.S authorities responsible. Complaints will be submitted to several countries because the affected users are from all over the world. Pirate Parties try to help users to defend themselves from any legal abuses. According to TorrentFreak, citizen rights groups and legal experts have interest for that and might take part. If you are one of those affected you can visit pirata, add your name to the complaint and protect your rights.
Source: [TorrentFreak]