I have to admit that I'm sympathetic toward The Hunger Games (the films, that is) because I think they're engaged in their thematic content to a higher degree than most people give them credit for. While the tone of the subject matter might be young adult/teen-oriented, the interplay between form and content makes them more interesting for serious viewers.
What I mean is that The Hunger Games consciously makes a spectacle out of the Games, which people within upper districts then watch. However, as moviegoers we are also caught up in the spectacle; the films implicate us in the atrocity by appealing to our very desire to go see a bunch of kids fight each other (granted, we know it's simulated - but I would argue that the wealthy people in the film who watch the games live also feel as though it's being simulated because they're distanced from the immediacy of the violence).
Basically, I think the films exhibit a fair degree of complexity because they register their content at the level of form (i.e. a popular, big-budget film that elicits from its viewers the same kinds of responses experienced by characters within the film). And if you ask me if I think the filmmakers are actually conscious of this, my answer is yes: I think they are, although I don't really think that matters.