Today, after much investigation, I've come to a hypothesis that technology's purpose is to gently erode the concept of "self" as it grows in power and scope. We drive this growth, but at the same time more than a few of us worry about how the growth is affecting our "right" or "natural state" of privacy to be who we want to be without blame or for someone speaking (in aggregate) to what our actions may hold in the future. It seems obvious privacy is a good thing, because as long as privacy exists someone can't take your information and do things in private with it as they see fit. The more tech they have, the more they can do with your data and the more they can "invade" your privacy.
Facebook's accumulation of information is concerning, not so much from the standpoint of the addiction that causes us to contribute to the quantity of data, but from the standpoint of collective thinking that arises from it.
I don't want to be part of a collection or be told to think with the collection. I want to be me and think about things that are important to myself. I want to do that without anyone else telling me how to think about it or speaking for what I know at a later date without knowing me.