People You May Know section on the right side of the site, Facebook normally suggests people with a lot of mutual friends, helping me get connected with people that I probably know. However, I recently added several game-only friends (people who play a Facebook game that I play) which seems to have increased the range of this list. Occasionally, Facebook recommends that I add friends that some of the game-only friends have added, which is helpful for expanding my in-game network. However, it has also been suggesting that I add friends who have no friends in common with me.
Why is Facebook recommending complete strangers to me?