My thoughts are, that there are a number of people/groups at fault. First and foremost, the parents for giving him access to this quality of media, and on such a constant basis.
Then, more abstractly, the state is somewhat at fault, for allowing the economic situation get bad enough that parents have to rely on such electronic media to occupy their children's time, while they work long hours.
Next, is the advertising industry, that incessantly pushes people more and more to work longer and longer hours, so they can live lifestyles that are not only nigh impossible to achieve, but also full of longing and emptiness as opposed to satisfaction and basic contentment.
But this is getting more and more abstract. Primarily, I tend to think the parents are at fault, though I'm sure there were many factors involved, and I tend to think that while no society is perfect, one in which this can freely happen, has problems. Laying blame in one place (be it strictly gaming or the parents), as a way of explaining things, is always dangerous. No one should be quick to jump the gun.