We were in Cooperstown, NY, for the national 12U invitational tournament a couple of years ago. Our first elimination game was a close one, and the opposing team was banging their bats against the dugout roof, making an enormous racket, and chanting, trying to rattle or pitcher. It was working! The umpires didn't know what to do, and the other team's coaches did nothing. Our coaches actually called our team off the field until one of the tournament directors could come to the field to get the game back under control. Their decision was that as soon as the pitcher came set, the dugout had to shut up. Of course they didn't, but as our pitcher regained his composure, one of the other team's parents said, "I guess it's not going to work this time." So this was how they attempted to win games? Not by being better on the field, but by making noise in the dugout? We won, and after the game, one of the parents actually threatened our pitcher! We had to play our next elimination game right after that, and the first team's coach went to one of the umpires and started badmouthing our team, trying to influence the umpire! Unfortunately for the coach, I was standing right next to him and asked him to please remove himself from my space.
It's not the boys, it's the parents and the coaches. They lead by example.
We lost the next elimination game, another close one, to a very classy team from Fayetteville, GA. As a GA native, I was disappointed in the attitudes of the Warner Robbins team. But I remember the Fayetteville Vipers and the good sportsmanship that they showed us.
I know that making some noise is part of the game, but that shouldn't be your strategy to win.
On the other hand... when my son came up to pinch hit in his first varsity HS game last year, the other team started making fun of him, yelling from the dugout. He was only 13, and was considerably smaller and slighter than everyone else on the field. They were saying things like "you must be this tall to play this game," etc. So my son hit an RBI double over the LF's head. SWEET! They were quiet after that.