I have my Facebook statuses feed piped to RSS and then filtering out the people that write the most useless stuff. That folder in my mail client currently has 1347 unread statuses, and that's just since the last time I marked "set all as read" a couple months back. I seriously question if people want to see everything. And I have a lowly 115 friends. Now take into account that more and more data is being pushed through that channel and I think it becomes obvious that eventually "show me everything" becomes virtually useless at some point in the future.