After U.S. officials shut down MegaUpload last week, the hacktivist group Anonymous began a revenge spree, which started off by taking down the U.S. Department of Justice, the Recording Industry Association of America (RIAA), the Motion Picture Association of America, and Universal Music. Their next target, according to a video released on YouTube by the user AnonymousVoice777, appears to be Facebook. Hackers belonging to the Anonymous group announced on Tuesday that they plan to attack Facebook on January 28.