Facebook friend finder is really creepy. It has suggested to me:
The father of a friend of mine,
whose existence in facebook was unknown to the said friend of mine himself.
The twin brother of a colleague of mine,
of whose family I had no idea whatsoever about,
Close friends of a school-going young relative of mine,
though I had no gmail or any other web-based contact with the said relative for a long time.
An old and longstanding crush of a friend
Ex-gf of a friend.
Additionally, I have lost count of the number of times when I first saw somebody's profile in facebook through their twisted suggestion mechanism, and much, much later, came to know who the person actually is.
And many more.
I have no idea how on earth they finds out all this connecting information. I have locked my security settings to the maximum. Nobody can find me on facebook unless I go to them and add them as a friend. Then how is this possible? How does it work!!!