a sanitation worker
A person who steals things from people's bags in public places is commonly referred to as a pickpocket.
The buss boy
an incumbent
chaperon
A billposter is a person who posts handbills or posters in public places.
Why is it illegal to shoot a person in public? same reason. it is murder.
people who smoke are stupid Don't listen to the person who called smokers stupid, he's extremely ignorant. As for smoking in public, it depends on your state, county, and city.
Nudisim
When a person speaks to an audience, it is called public speaking. It involves delivering a message or speech to a group of people in a public setting.
Wireless communications are available in public places, this is called WiFi. Sometimes there is a fee for using the wireless internet. Often places like coffee shops have WiFi.
Hot spots.
A person holding a public office requiring election getting there is called a politician.