What is it about a car that makes people feel so alone?

On the bus on the way home being amazed at how very many people are texting and driving.... When I see something I wish I hadn't..

Don't people realize that in a car, you are surrounded by 360 degrees of glass, and people? If you wouldn't do it in an elevator (don't get me started on things people do in elevators that they shouldn't) then you shouldn't do it in your car...