The idea of gradually exposing more people to the benefits of riding around in self-driving taxis and other vehicles seems to be the guiding philosophy for a number of companies such as ride-hailing giant Uber, MIT startup NuTonomy, and the company Waymo spun out of Google's former self-driving car project.

Top concerns mentioned in social media included self-driving car fears of being hacked and "robot apocalypse" scenarios of technological change.

About 6,000 social posts focused on the positive side of self-driving cars as a "technological revolution that harnesses big data and machine learning."

 Another 7,000 social posts discussed self-driving cars as a possible solution to traffic jams and highway congestion even as they also featured angry venting. Read more at : 

http://blogs.discovermagazine.com/lovesick-cyborg/2017/05/30/hacking-and-doomsday-top-self-driving-car-fears-online/#.WT4agxOGO8U