In nature, a crashing sound indicates danger, prompting a "fight or flight" response. The body is energized and the brain switches from deep to rapid thinking and becomes more impressionable.
In moderation it can be fun to artificially induce this response (such as with a fight song at a football game). But I fear that children are getting addicted to the hormones released when they listen to their music. As the body tries to adjust, they need harsher sounds to stimulate the same "high" it gets louder and singing turns to screaming. They lose their sensitivity to the simple pleasures of life.Children should perhaps try an experiment. Follow "missionary music standards" for a month and see how it affects their life.