Résumé:

Tyson Balcomb quit Facebook after a chance encounter on an elevator. He found himself standing next to a woman he had never met — yet through Facebook he knew what her older brother looked like, that she was from a tiny island off the coast of Washington and that she had recently visited the Space Needle in Seattle.

Lien:

http://www.nytimes.com/2011/12/14/technology/shunning-facebook-and-living-to-tell-about-it.html?_r=2&emc=eta1