1) Behave without proper golf decorum (i.e. no loud swearing, drunken behaviour, yelling at players)
2) Run. There is NO running at Augusta.
3) Use a cell phone or camera (cameras are allowed on practice days only).
In general, the crowd was the most amazing sports crowd we’d ever seen. Everyone was respectful, threw away their garbage. Everyone was quiet – you could hear the birds sing when a player was agonizing over an important putt. That of course was followed by a huge roar when he made it!