The U.S. government scans the social media accounts of foreign visitors who want to enter the country. Employers scour social media posts before offering candidates a job. And what you post in social media gets scooped up and analyzed in order to advertise to you.
Soon our digital footprint may be used to determine whether or not we can travel. In particular Airbnb may use this information to determine how likely you are to trash the home you want to rent.