Depends where you are.
Germany, for example, has laws that make it illegal to record people in public doing things that could embarrass or demean them.
Japan made google throw out their original streetview data and do it again with a shorter pole so that it didn't look over people's fences.
Different countries have different laws.
Oh they meant served as in military service. Given the context, I read it as anyone who has been a server/waiter and served food.