Check out this article from Game Revolution. Using data from the U.S. Department of Justice, Bureau of Statistics it shows that contrary to the current media hoopla over the epidemic of youth violence,
recent data shows that "... the offending rates for 14-17 year-olds reached the lowest levels ever recorded.” The data is only available up to 2003, but at least herein lies some hard facts with which you can confront those who find your choice of entertainment "distasteful."