Even the fact that you state seemingly basic facts about yourself, like that you like a certain career, will influence how Facebook appears to you. Have you ever wondered how you see ads on Facebook that have exactly to do with the things you said you like on Facebook? That's why. Facebook knows what you like and uses it to encourage you to buy things or click on certain websites. Facebook is a mirror of yourself, a mirror that has always been highly valued because we value privacy and security above all else, especially in American culture. Sadly, this precious asset is lost in seconds, any day and at any time, at the fingertips of outsiders..