First, the WSJ article, taking the smothering-mother approach.
Second, a response, and one I have to agree with.
The WSJ article makes good points. Why subject children to horrendous things, that they shouldn't have to deal with during their last few years of childhood? Wendig's reponse makes better points. This is not a perfect world, and kids are submersed in shit before their parents can even think about it, and books are a good way for them to wrap their heads around it.
Yes, media these days can get unnecessarily violent. But to an extent, a shock is necessary for anything to be grounding. Things need to be exaggerated for a sheltered kid to understand the consequences. And just to be straight, under no circumstances is censorship okay.