In this Saturday, Feb. 11, 2012, photo, protestors wearing Guy Fawks masks hold the logos of the international hacker group Anonymous during a demonstration against Anti-Counterfeiting Trade Agreement, ACTA, in Budapest, Hungary. The shadowy world of Internet hackers and pranksters was rocked by news Tuesday, March 6, 2012, that Hector Xavier Monsegur, 28, one of the world’s most-wanted and most-feared computer vandals has been an FBI informant for months and helped authorities build a case against five alleged comrades. (AP Photo/MTI, Janos Marjai)

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