A) Yes, I have more thoughts. :)
While I don't think that the media is really responsible for the way people act -- I'm pretty sure that people are responsible for their own actions -- I think that media has a big role in shaping a person's world-view, especially when that person is a kid.
Sex, for example. You can't really turn on MTV without being bombarded by sex. I think this is a little irresponsible, since it gives kids the impression that all teenagers are having sex, that there's nothing in the world more important than sex, and that anybody who has a less carefree attitude toward sex is somehow aberrant.
I'm the last guy in line when somebody shouts, "All the prudes over here!" Actually, I'll probably ignore the line entirely and go looking for girls.
But that doesn't mean that I think sex is something to be treated lightly. Like most important things, sex is dangerous and needs to be treated with a certain amount of respect. It's like the equal-yet-opposite equivalent of a shotgun. Handle it wrong and people could die.
So I guess I'm of the opinion that while kids (and adults -- who are often just kids with fewer hormones) need to control themselves and not let the TV do their thinking for them, it would be nice if they could turn on the TV without being told that if you're fourteen and you've neither given nor received a blowjob, you're a loser. 'Cause you're not, it just means you're a kid. And there's nothing wrong with being a kid.
