OK who does tell people NO?

Mothers tell their children, "No, don't do that", all the time.

Let's don't forget fathers they do the same thing.

Teachers tell their student, "don't cheat on the test", "don't copy other people's work".

Friends tell friends what they are doing wrong and ask them to stop.

Children tell their parents to stop certain activities.

Minister tell there flock to drop certain ways.

How about news papers,TV, radio and the internet? How much time and space do they spend telling us NO?