Aside from the NBA playoffs, I only watch one hour of TV a week anyway. I just got sick of all the junk that TV was putting in my head.
As far as the underage sex on TV goes, I think it is easy to generalize it, but that is only because that is how it is treated on television. It seems impossible to deal with the topic adequately for a half-hour episode. The shows can only deal with one or so of the aspects while teens in real life have to deal with all of the consequences, whether it is an unwanted pregnancy, issues of fidelity and commitment, relationships with parents and friends, religious implications, divorce statistics, rape issues and/or sexually transmitted diseases. Instead, television shows usually don't outright promote sexual promiscuity, but they don't go very far to inform or discourage it either. Whether or not one feels like that is their responsibility is another debate all together.