I don’t really have a dog in the whole child-soldiers-in-YA-media thing. Some YA media acknowledges that the situation is bad, but the kids have to do it anyway because every single adult who could have intervened is incompetent, indifferent, or complicit, and some YA media just never brings it up in the first place, and both approaches are fine – you have to consider the target audience, after all.
I will, however, give a piece of YA media the side-eye when it wants to do the “actually, these are child soldiers, and that’s fucked up” thing, but only when the bad guys do it, while simultaneously celebrating the good guys for doing the exact same thing. Like, what exactly are we implying here?