[boi_v2]

In FB you use your wall to publish the info you want to share openly, the other important stuff like private chats, online behavior (clicked links, friends you visit, photos you see, time of login/logout), groups you participate, GPS locations of places you've been or are and etc are not supposed to be open to anyone.

[nir]

Yes, but experience shows it's FB's interest that you share as much of your data as possible. It's not going to change, publicizing your data is its whole business.