Janet, that sounds like a nice concert to bring McK to. Allan and I always bring earplugs if instruments are going to be plugged in, and sometimes to movies too.
I think we let M see Batman at home. He was about 4 when the first one came out. UAN - Pulp Fiction? OMG! I could barely handle Pulp Fiction! Once was definitely enough for that movie! I remember being really angry that L's dad took her & his girlfriend to see "There's Something About Mary" when she was about 11 and getting into trouble for being too - outgoing. The first thing she did was come to my house and tell me about the "hair gel" scene. OMG, no WAY! She didn't appreciate at ALL that I didn't think that a 40 year old man and his date should take an 11 year old girl with no mother figure in the house out to see that movie.
Honestly, I think that the movie makers push the envelope with these things. I don't think that the story could NOT be told without the graphic stuff that makes it PG-13. They just worry that adults won't go see it if it's not PG-13. Absurd. If you make a good movie, people will go see it.
The shooting is a tragedy that is completely outside of what I am talking about here. I felt so badly for his mother, it sounds as though she knew something like this was likely to happen and had tried to get help for him. There but for the Grace of God...