I'm amazed at the failure of Facebook in this regard. They were in a unique position to make it work, and then failed. With make it work, I mean that everybod

I'm amazed at the failure of Facebook in this regard. They were in a unique position to make it work, and then failed. With make it work, I mean that everybody moves in different circles, family, work, friends, hobbies, etc. And you need to have easy control over who sees what. And Facebook has most of it, except that last bit of UI to make it work. (Not that I like Facebook)