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Mark Zuckerberg took a restraining order out on
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Mark Zuckerberg took a restraining order out on his stalker, Pradeep Manukonda, who sent Zuckerberg threatening handwritten letters and messages on Facebook.(Credit: Getty Images / Ronaldo Schemidt)

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Celebrities who've been stalked

Uma Thurman, Catherine Zeta-Jones and more: See which stars have had to deal with fans who took their obsessions too far.