We wanted to examine Facebook users’ mental models of how tagging and apps varied regarding the management of confidant disclosures. In the survey, we asked participants the following questions: (a) Who can see photos or posts that your friends have tagged you in?; (b) Photos I am tagged in only show up on my timeline or wall if I approve them (true/false); (c) Which types of your profile information are your friends able to share through apps?; and (d) A Facebook app can only access my profile information if I add the app (true/false). After answering these questions, we asked our participants to log in to their Facebook accounts and report their actual privacy settings. We compared their actual settings to what they believed to be true about tagging and apps. We classified their answers into four categories: “Correct” meant that their mental model reflected their actual privacy settings; “too open” meant that they thought they were more private than they actually were; “too closed” meant that they thought they were more open than they actually were; and “not sure” meant that they either answered “I don’t know” or we could not categorize their answer clearly based on their privacy settings or because of missing data.