[dcw303]

The funny thing is that this would be very easy for Facebook to fix - just a line of text under each friend request explaining the suggestion:

  * "You're both friends of Duffman McPartyDude"
  * "We found Psycho Ex Boss's phone number in your contacts"
  * "Location Services confirms you were both frequenting a dubious drinking establishment at 4am three Saturdays ago"

Would they do it though? Of course not. It would scare the hell out of their users if they knew how this algo actually worked.