Facebook has tracked its users' web behavior even when they are logged out of Facebook; the "fixed" version of the site's cookies still track potentially identifying information after users log out, and these same cookies are deployed whenever anyone (even a non-user) views a Facebook page. Last year, a 24-year-old law student named Max Schrems discovered that Facebook retains a wide array of user profile data that users themselves have deleted ; Schrems subsequently launched 22 unique complaints, started an initiative called Europe vs. Facebook, and earned Facebook's Ireland offices an audit. Are you my shadow profile? In one particular complaint, Schrems alleges that Facebook not only retains data it should have deleted, but also builds " shadow profiles " of both users and non-users. These shadow profiles contain information that the profiled individuals themselves did not choose to share with Facebook.