This was a gripping one. I do not actually much care for actual detailed breakdowns of cinematography in real life, but for some reason it works really well in horror fiction. (Well, sample size of two so far, I guess, between this and "Final Girl Theory".)
Honestly, the only criticism I have is that I feel like this story is too kind, positive, and optimistic. It assumes that the American public would be horrified by a school shooting and would be at all fazed or impressed by an indictment of themselves as audience. The real-life responses to actual similar events are a lot more bleak and even more horrifying, to me. (For example, parents of Sandy Hook Elementary victims being stalked and receiving death threats for talking about how their child was murdered, because the senders of said threats fear that they might not be able to buy some of the products they like as a result of that conversation.) For those of us, in contrast, who have a functional sense of empathy, this story is a rough ride.
What a world, where horror authors struggle to convey something more shocking, more appalling, and more disgusting than actual reality. I sincerely wish I lived in the reality where one school massacre was a national tragedy that still reverberated in the public consciousness years afterward, instead of just another Tuesday.