...and so it is up to the parents of the child to provide the strongest clearest influences that their child will need to frame their lives.
If the parents set the examples and the boundaries as their child grows, it is less likely to be completely swayed by TV violence, peer pressure and the like.
I grew up in a close-knit family, the son of two former teachers who stressed learning as much as having fun. I was taken to movies like Jaws, and The Poseidon Adventure, etc. and thanks to limited TV back then, most of the members of my family had creative pursuits (baking, knitting, playing instruments, etc.) and read quite a bit.
My Grandmother (my main babysitter) was very religious and would read the bible to her grandkids and she never sugar-coated or dumbed down any of it and would discuss it with us or answer our questions. For a contrast her husband, my grandfather loved westerns, Detective and Spy novels. So growing up, I had equal parts Bible, Billy the Kid, Jack and the Beanstalk, and James Bond.
As time went along our restrictions to TV were lessened, but my siblings, cousins and I already had a more colorful, rich understanding of life than could be had just sitting immobile staring at the screen like a zombie for hours.
Yes we were influenced by TV... I still remember running around the house with a towel tied around my neck, jumping off the furniture believing I could fly, or accidentally putting my hand through one of the panes of glass in the living room window pretending I was the Hulk (it was a miracle that all I got was a little cut on the pinky finger!), but it was my parents application of love, candor, and most importantly disciplinary actions that helped me get to this point.
I would conclude that children are going to pick up both good ad bad from every source not just "the media." So parents have to be vigilant with themselves and exemplify the type of life they want for their children, because rest assured kids pick up on every signal their parents give off. Even though they may not have the vocabulary or fully understand, they notice every emotion, habit, truth, and hypocrisy in their parents.
My dad cites learning that he was going to be a father as the reason he stopped smoking. I can also count the number of I times I heard my parents use profanity in my presence on my fingers.
As I a parent, I would not let my children watch much TV, or use a computer in the home unsupervised, and I'll try to inspire in them an appreciation for learning and experiencing the world with their whole being, not sitting stationary clicking a button or watching a screen. Also, even though I am a fairly serious gamer I am not going to allow my kids to get into or have video games in the home til their teens, and if necessary, I would be willing to give them up myself to benefit them.