Peculiar Public

Why do people insist on taking care of personal, and private, business in the public arena.

Things I have noticed:

1 – Nose picking, and yes, eating it
2 – Nail clipping; I have seen this on public transportation and more recently I saw a guy doing this outside of a high-traffic office building
3 – Arguing with someone on the phone
4 – People who do not bathe regularly
5 – People who cough and sneeze without covering up
6 – People who pee on bathroom seats
7 – People who don’t wash their hands after using the bathroom
8 – People who floss in public

Aren’t these things things that should be done behind closed doors?