“When you’re children start acting violently and immorally”
I will not address the grammatical/spelling error in your sentence. My children grew up watching tv, and none of them has turned out either violent or immoral. I think that many of us tend to make rather sweeping statements when trying to make a point, often at the expense of the limits of exaggeration. Points are made far better when there is no hysterical hyperbole attached. For example, there is a clear and direct correlation between excessive TV watching and obesity in those children who are getting little exercise, due to their couch potato habits. There is a dumbing down of our culture. Children read less. These are real concerns.
OTOH, our kids are more well-informed about the world around them. They can watch some really excellent programming, they can learn to read at an earlier age (my son was reading at age 3, when Sesame Street and the Electric Company made it all click into place), and they can be exposed to GOOD things which they might otherwise not see, such as plays, classical music, historical novels, etc.)
Everything in life has the potential to be good or bad, even drinking water, if done to excess. All things in moderation, can prove to be beneficial. You don’t want a TV? Don’t have one. But there is no reason to disparage those who use their tvs in a judicious and positive way, to enhance their enjoyment of the world around them. And if you watch movies on the computer, you are “watching TV,” whether you are willing to admit it to yourself or not.