Why do larger cities breed robots? Are people really so absorbed in themselves that they can't acknowledge the human beings around them? Is it really so hard to make eye contact with, smile to, and give a slight nod to people you meet on the street? Or even a polite "Hello" or "Good morning/afternoon"? I know that I always do when I pass someone who returns my eye contact, to me it's just proper etiquette.
This is the photo that prompted this thought.