similar to other social networking sites privacy setting. make it possible to set your profile either so that only your friends can see certain things (online status/ last visited, ect.) or you could set it so that nobody could see these things (if it helps with your card strategie when in games w/ friends)
reasons: allow an easier flow of connections throughout the internet community of CC.
What made me think of this: tdans asked me to join a speed game when I had logged off. if he could see that I was offline (since he's on my friends list) that would be one less wall comment. one less byte of information to be upheld by the server. Also, the friends/foes could be placed somewhere a bit more convinient

happy kotaro?