Who's Watching You on Facebook?

Do you really have privacy when it comes to your Facebook page? Are you aware that what you may be putting on Facebook is being viewed and collected as usuable data by those you do not even know such as local police departments and higher level government agencies? Facebook has become the biggest social media force since the creation of Myspace.  Facebook has overpowered Myspace becoming the 1st site for all forms of social media.  So is Facebook friendly or not friendly when it comes to privacy? How should you protect your privacy and yourself on Facebook?