[rwolf]

One major problem is that Facebook's privacy model for a long time was "trusted with everything"/"trusted with little", and the criteria for entering the inner circle was "the user adds you as a friend." Combine this will social pressure to reciprocate friend requests, and you have a mess.

I wonder what effect allowing assymmetric contacts will have. Will users get used to people "subscribing" to them without reciprocating, or will we all try to achieve the ultimate high score by "friending" everyone we can get ahold of?