As a parent, perhaps you can be a bit discriminating about what your kids look at, if they don't want to not look and you have a TV in the house. I know some parents who got rid of the TV, but as they still had kids, they realized that they had to spend more time with the kids and do something that was fun rather than looking at TV. So it may come back to what I've said before: do we have the time to give them what is necessary for them? So it may be that you just have to spend a little bit more time with the kids so that they're so busy doing other things that they don't want to look at TV.
Sometimes it depends on their age as well. With teenagers you often can't do much, because they are not going to listen to their parents as much as they're going to listen to their peer group. So it also depends on what age they are. Yet even with teenagers, I know my parents went on a lot of outings with us to the beach, or camping, whatever and there wasn't any possibility to have any TV there. I'm thankful to my parents for that.