Crazy
Is this ever true:

First, due to the giant strides made in modern communication technology, it is impossible to tell crazy people who hear voices apart from people with a hidden earpiece and microphone talking to their broker. This is a bad thing. It used to be you knew whom to avoid or not stare at, but now, everyone’s running around talking to the air, and you just never know.

I wonder if younger kids will lose sensitivity to this. If you grew up in a city or visited one enough, it doesn't take too long to realize that the person standing alone having a conversation with no one was probably someone to be avoided. Now you always have to double check for an earpiece.