One of the worst violations is talking when somebody is swinging. If you want to be a jerk and have people hate you, go ahead and talk.

Do not throw clubs or use foul language. It is just not polite and could make people feel very uncomfortable.

Whenever someone is putting you have to move your shadow away from the person's viewing. A moving shadow could distract a person's eyes, causing them to miss the hole.

When you are on the green and you putt out your ball, do not step in the other person's line. (A line is the path of the ball to the hole). If you step in someone else's line, it could mess up their shot causing them to miss.