Yes it does effect the personality and values: here are some links of the studies which shows the effects of violence on TV and Violent games on children and a common man:
http://www.researchomatic.com/Violence-On-Television-73892.html
http://www.researchomatic.com/Effects-Of-Violent-Television-Programs-And-Movies-On-Children-93566.html
http://www.researchomatic.com/Does-The-Media-Influence-Juvenile-Delinquency-45584.html