Hehe, well maybe those weren't the best examples. I have Facebook because it helps me keep in contact with friends and family.
The discussion was in a private channel.
I do think that #discussion has a lot of potential. The back and forth conversations can be a lot more interesting for users to participate in.
Yes, that is the #1 purpose for Facebook, always ways, always will. :)
However a lot of people have grown tired of it, and when someone asks me "hey! Send me a friend request on Facebook", I just reply, I don't do facebook anymore (and I don't). :)