I'm sure if there were no video games, no television, and no other forms of entertainment in the house, someone would spin the story to paint the dust mites or perhaps the brand of hardwood floor finish as a bad influence on the child.
As others have said, the boy had no right to be playing that game in the first place. And rather than chalk this one up to the lack of proper (for that child in particular; I realize not all cases are the same) adult supervision or even giving the whole situation an in-depth look, they're filling the informational void with "video games kill people"-brand packing peanuts.