Have you noticed that when you walk through any crowded area - a shopping centre, a main thoroughfare or a mall, exit a theatre or cinema after a performance - that people will just walk out in front of you or change direction without warning, causing you to swerve in order to avoid a collision? And when you fail to swerve in time and a collision occurs, how angry do they get? It's never their fault! And then there are those who exit a doorway and then just stand in the middle of a stream of people expecting others to go around them.
I understand that you can change your mind about what direction you're going in at the last minute but for pete's sake (and mine!) look both ways before you make a sudden turn or stop. If all these people drive the same way, no wonder the road toll has escalated!
Is it possible that a decade of sitting in front of computers where your eyesight is focussed on a direct path has taken away our ability to sense movement out of our direct line of sight? I think so!