@xris,
Our current internet generation is being raised on pornography and violence, through internet videos, video games, and graphic movies. It's the first time in history that so many people are being affected by such realistic, high-tech forms of media. But, is there any data to suggest that this is leading to increased violence, or relationship problems? I'm not aware of any.
My personal opinion is that these things are harmful, and probably that the gratuitous violence seen everywhere now is worse than nudity or sex acts found in porn. There's something to be said for desensitizing young minds to this type of explicit material, year after year. Adults can watch porn and violence on TV and know that it is fantasy, and perhaps it can even serve as an outlet for people to watch porn, or play a violent video game.
But children, some at different ages from others, are not entirely sure where fantasy ends and reality begins. And when many are being raised by the TV, internet, and video games, as parents are off working towards the American dream, they could come to view these forms of media as accurate, complete, authoritative takes on reality. When the parents aren't around to provide a well-rounded moral base, the media takes their place. This can be seen as years upon years of psychological conditioning of a developing mind, and regardless of whether or not it's even possible to establish a causal link between media exposure and unacceptable behavior, there is a right to be concerned here.