With some of these threads about NPC's and the inner voice thread I feel I should mention some strangeness I have witnessed.

A few days ago I was out picking up things needed and i had 3 people start talking to themselves as I approached them, yet they were speaking strange questions. They never looked at me directly but it was all within 10 minute span of time. [none of them had Bluetooth or any other wireless things to point to a phone conversation] Two of them were women 70-80 in age.
I stopped each time and looked at them yet they kept moving away turning their heads as if they were looking around. The last one was a man and his mannerism and the nasty language he used I had to tell him "you better act like you are on the phone!" He said "aww hell no" and stuck his finger in his ear and turned back and walked away.

Over the last 6 months I have also witnessed what I would call flash mobs, not mobs but suddenly random unfamiliar people showing up almost out of nowhere making where I was very busy all of a sudden. None of them were nice or smiling mostly looking down or determined on a path.