I've been chewing on this one for a while, but some recent things--the Hunger Games and Avengers movies, in particular, brought this on. I've written about warnings elsewhere: A Warning About Warnings and Warnings in Sim Stories. This one's related: it's about ratings.
Here's my thoughts on the Hunger Games Trilogy. Everything is under a cut so no one will be spoiled. I also don't have it in any particular order. Also, it is long.