Hard rock and heavy metal music have been causing controversy since they were first invented, and many people believe the music to have a negative effect on young people. Music featuring distorted guitars, bass, drums and loud or screaming vocals can be thought of as "hard rock," and bands such as Black Sabbath, Led Zeppelin and Judas Priest can be classified in this way. Parents are often concerned when their children begin listening to hard rock because of the aggressive sound and occasionally explicit lyrics. If you are concerned, investigate the possible negative effects of hard rock.
Read more : http://www.ehow.com/info_8034365_hard-rock-music-negative-effects.html