You could, for example, hide an unflattering photographofyourself from your timeline but if someone else posted that picture and tagged you in it, it could be found and displayed if people search for photos of you.
On the back cover of their final issue was a photographof an early morning country road, the kind you might find yourself hitchhiking on if you were so adventurous.
But whereas mug shots encourage you to look for differences between yourself and the person in the photograph, Bertillon's turn-of-the-century crime-scene stills uncomfortably reveal similarities.