The saying is, "Garbage in - garbage out."
Another way of putting it is, "What goes into the mind, comes out in life."
Having a teen boy and one approaching teens, I stress this frequently. They "know" the saying. I often point out examples of this when I see them. Unfortunately, if you look around you, you will see MANY
One VERY SMALL way to prevent "garbage in" is to monitor the movies and shows that your children are watching. It's not always easy but once your kids see examples of what happens to people's lives who live on "garbage in," they will not fight back so much when you have restrictions.
Yes, it's important that children obey just for the sake of obeying, but how are they going to learn the "whys" if you don't show them. If you just say, "Because I said so that's why!" all the time, they won't be able to develop in their own minds and hearts.
Plugged In Online is one way that I monitor movies. As far as shows on TV go, if you just hang around while the show is on, the radar in your mind will start to beep! Warning! Warning! I'll be honest, we have had to put our foot down on Disney Channel and most of the other channels for kids, mostly for the indoctrination of KISSING and dating to young children. They fussed about it a little in the beginning but soon saw why we stopped the channels.
Encouragement ~ BE THE PARENT!