I think 'good job!' and 'nice play!' and 'woo-hoo!' are good for the game. I think most of the noise that comes from the stands is positive and makes the game more fun. So no, I wouldn't go that far.So games should be silent for the most part, just coaches giving direction and umpires making calls? Players know when they do something good and when they make a mistake, I guess we should all zip it in all circumstance?
I was talking about one particular instruction that I think isn't helpful, and I explained why. And as a generalization, I think that players get too much instructional commentary from the bleachers (and probably the dugout as well) and often would do better to figure out how to think and feel for themselves. Pitchers in particular.