I really doubt it would be that easy to KO Facebook. Remember Orkut? Google is great at a lot of things, but building online communities is not one of them. Also, as has been pointed out in other discussions: most Facebook users don't care and aren't going to leave unless there's a compelling reason. A lot of their photos are already locked into Facebook -- it's going to take a lot to show them a greener pasture, and I doubt "better privacy" is going to be one of them.
