Actually, I wonder the same thing! just like Tennis. Good grief don't fart belch or make a sound when serving. I love golf, played all flipping weekend, yea and it was hot too, but its Texas. Golf certainly has some snob rules though.......
"The difference between golf and government is that in golf you cant improve your lie"
John Daly
If you want to see spectators doing the exact opposite of golf spectators, watch pro cycling.
It's like the sea parting as the cyclists ride up the hills. The crowd is all over the road, lighting smoke bombs and waving flags.