At the time we deployed the survey, Facebook allowed users to manage the privacy settings of uploaded content (photos, videos, statuses, links and notes) using five different granularities: Only Me, Specific People, Friends Only, Friends of Friends, and Everyone. Specific People allows
users to explicitly choose friends (or pre-created friend lists,discussed below) to share content with. The default or “recommended” privacy setting for all content is Everyone,
meaning users share their content with all 750 million Facebook users [7] if they decline to modify their privacy settings. Facebook allows users to re-use Specific People privacy
settings via friend lists. Users create a friend list, add a subset of their friends to it, name it, and can then select the list as a basis for privacy control. Friend lists are private to the user who creates them, unless the user explicitly chooses to display them as part of his profile.