But the real trick was the “friend graph remnant.” When two people had once been friends, and one deleted their account, Facebook scrubbed the data—but not the timestamp of the friendship . By cross-referencing timestamps with public events, you could deduce where someone was on a given night.
Facebook frequently updates its code to force users to log in. If a method stops working, it's because Facebook closed that "window." If you'd like, I can help you: Refine your search for a specific person. Explain privacy settings so you can hide your own profile. Find alternative platforms for people-searching. view facebook profiles without account
Despite the walled garden, the wall is not impenetrable. There are generally three methods employed by those seeking to view profiles without an account, though their efficacy is waning. But the real trick was the “friend graph remnant
Would you turn it?
The Digital Peephole: The Reality and Ethics of Viewing Facebook Profiles Without an Account If a method stops working, it's because Facebook
Facebook used to have a public "People Directory," but it has become harder to find.