Social media is a growing force not just among marketers but among society, changing the behaviors of more and more people as it becomes impossible to resist participation. A cautionary tale has been experienced by Facebook users more than once, as once-private settings were made public without warning. LinkedIn, once regarded as a more professional setting with trusted parameters, recently opted in 100 million users into sharing private information within advertisements (with no announcement to their customer base). The default is to be opted in. Read the article to learn how to opt-out and guard your privacy.