When repetition is being used in a passage, the author wants you to know that whatever being repeated is a main point, a key in understanding, or the point of a concept. If something is being repeated in a question, that can help you deceiver what the question is asking, or any clues given.
TV is a big influence on our children's choices. But, I do agree, us as parents must lead our children's best interest in a healthy and wise direction.