Are you having to make the choice between liking your cousin’s baby pictures and protecting your privacy? Your actions on Facebook and other social media leave an invisible footprint that companies pay a lot of money to uncover. If you’re on Facebook it’s likely your political preferences, shopping habits, educational status and other information is in the hands of sophisticated marketers. If you’re not on Facebook, you might be missing out on updates about friends and family across the country or even across town. How vulnerable are you to the influences of those who use social media for a commercial or political agenda?