Study: Facebook lets ads target your account using info given for security purposes, like your phone number, as well as info from your friends' address books (Kashmir Hill/Gizmodo)

Kashmir Hill / Gizmodo:
Study: Facebook lets ads target your account using info given for security purposes, like your phone number, as well as info from your friends' address books  —  Last week, I ran an ad on Facebook that was targeted at a computer science professor named Alan Mislove.

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