"Zuckerberg sometimes amused himself by conducting experiments. For instance, he concluded that by examining friend relationships and communications patterns he could determine with about 33 percent accuracy who a user was going to be in a relationship with a week from now. To deduce this he studied who was looking which profiles, who your friends were friends with, and who was newly single, among other indicators." -- David Kirkpatrick's The Facebook EffectDan Loewenherz was sitting up one night with fiance and his mom, trying to conjure up a guy to set up with his fiance's sister. They finally came up with the perfect guy, enthusiastically checked the guy's Facebook profile and to much disappointment, saw that he was in a relationship. I know this has happened to you: You meet a great guy or girl, immediately run to Facebook or Google to Internet stalk them and find out that they're spoken for. Boo.