I think the violence in the media does not have a negative effect.Children these days are getting bullied and their parents,older brothers and sisters won't teach them how to fight so they turn to television or videos.
Having things on their mind doesn't mean that it's negative. If people would teach their child or children to stand up for themselves they wouldn't have to go to the media. The media is really for entertainment. Nothing negative rarely happens in movies or on television. Honestly, it's good for children to know what's going on out in this world and true enough things aren't meant to be taken into action. Children need to know about the crazy things people do out in this world.
It's not that they are being violent because of television. Children are going to be violent anyway. Children will be children and they get upset. It's not their fault that the things that come on television is entertaining to them.