Something even an admin hasn't bothered finding out!
One can send friend requests within the forum which the recipient can then accept or reject.
I just received one from a poster I don't know personally at all.
Does friend status serve any actual useful purpose or is it just a token add-on for people who cannot survive more than five seconds if they feel that they are not connected to Facebook?
(Although I post quite regularly on certain Facebook sites now I still refuse to have anything to do with the public listing of "friends").