The 'hacktivists', infamous for meddling with the American government and for their support for WikiLeaks, have announced that they will focus on bringing down the social networking site because of its privacy policy.
Facebook was started in 2004 and has more than 750 million users worldwide. Its 27-year-old CEO, Mark Zuckerberg, is thought to be worth £8.3 billion ($13.5 billion) according to Forbes.
And while its popularity appears to be increasing, many questions remain over privacy issues - there are fears that the information uploaded by users will be passed on to other sources
Last month the group created a Twitter account and uploaded a YouTube video to highlight its intentions - and has urged those willing to rise up against Facebook to join it.
The chilling video, a two-minute warning and explanation using a computerised voice, begins: 'Attention citizens of the world ... Your medium of communication you all so dearly adore will be destroyed.
'If you are a willing hacktivist or a guy who just wants to protect the freedom of information then join the cause and kill Facebook for the sake of your own privacy.
'Facebook has been selling information to government agencies and giving clandestine access to information security firms so that they can spy on people from all around the world.'
watch the videos here ! http://www.youtube.com/watch?v=SWQTS8zqYXU&feature=player_embedded#at=52
