So in the end we will share everything with our friends, but our friends will only pretend to listen.
It's not pretending if they've muted you, you're being ignored. Which is not a bad thing, noisewise, it natural and to be expected, but that's besides my point.
My point is that you will always have a default friend who wants to hear everything you share, a friend who will never mute you, never block your Zynga Blogville updates. No, it's not me, nor is it Tom Anderson; your default friend is Facebook itself. FB will always listen to you and will always want to know about everything you do.