It's a great way to stay in touch with family and friends, but it has a dark side to it. After eight years of consistent use, I finally deleted my account.
I just got tired of the frequent changes to the privacy policy. It's ironic that I was always the one to rationally analyze it, accept it and adapt to the change, rather than complain. The reason for that is that I prefer acting more and complaining less. I can accept an annoyance or two (or even three) because I understand that the stars don't always have to align just for me; however, once an unpleasant identifiable pattern is established, I act accordingly when I can no longer accept it. In this case, I walked out of Facebook. I don't want to be part of a place that pays lip service to "privacy," only to frequently change its definition of it. You may be comfortable with certain privacy settings for a time, but when you least expect they are changed unbeknownst to you. I judge by actions, not euphemisms.
One of the changes that annoyed me the most was when they made it possible again for anyone to email one. In the past, one can set it so that only friends can contact one, but then they changed it so that anyone can send messages to anyone. The only thing is that now they would be stored in a practically invisible "Other" folder (as opposed to the visible "Inbox."). This is vexing to EVERYONE, not just those who choose to set their page so that only contacts can email them. For those who didn't mind being contacted by the world, it took a while before they figured out they had a bunch of "Other" messages waiting to be read.
I always witnessed people endlessly complain about the changes; if they acted as much as they complain, Facebook would be catering more to our needs than the NSA's. My advice to you is this-- if you're unhappy with Facebook changes, for the love of Zeus, LEAVE! If you decide that your reasons to stay are stronger than your annoyance, quit complaining! Actions speak louder than words. After an established pattern of this behavior, it is safe to predict Facebook will not listen to users' petitions.
Who stands to benefit from our constant need to share, like and comment? Marketing companies who target intrusive ads at us? The NSA in desperate search for subversive key words? Mark Zuckerberg and all Facebook shareholders? Our stalkers? In turn, what do we get out of it? These are all questions worth analyzing when one plans to either leave or return to Facebook.