After reading Ty Burr’s review of “The Kings of Summer,” I feel compelled to write to suggest a story about the messed-up rating system we have (“Teenagers off the suburban grid in ‘Kings,’ ” g, June 7). Last night I took my 12-year-old son to see “Kings.” It was very enjoyable. I was shocked to see that it is rated R. Yes, there is a little swearing and a little drinking. How is it that this film is considered not appropriate for viewers under 17, whereas “Man of Steel,” “The Dark Knight Rises,” “World War Z,” “Fast & Furious 6,” “White House Down,” “The Hunger Games,” etc. are all rated PG-13 — which means any kid can walk into the multiplex and see them — despite the impalings, burnings, entire cities and populations destroyed, etc.?