Facebook is in the process of a much needed overhaul of their privacy structure, one that is bound by a rather complex yet ineffective model. They will be allowing users to control permissions for browsing personal photos and entries. The system will be based off of three tiers- friends, friends of friends and everyone. Currently, users are bound by groups defined by college boundaries, which is a model that has become obsolete.  Facebook founder Mark Zuckerberg said in a post Tuesday evening: “almost 50 percent of all Facebook users are members of regional networks, so this is an...