I went to the theatre from a very early age, but my mom started us off at a children's theatre. A show geared towards children with an audience FULL of children! Eventually we moved up to things like Annie and Oliver. By the time I was 9 or 10, I went to pretty much everything basically because my mom generally didn't know what she was taking me to!
I recently went to the RENT tour, and there was a little girl no older than eight or nine in the front row --- in a lepoard print outfit! And it seemed like she had seen the show before. I saw the show when I was 13, and there were still things that went over my head at that time. However, times have changed and the 9 year old probably knows more or as much as I knew at 13! Would I take my 9 year old? Probably not. The thing is - while I've always loved Rent's music, it wasn't until I understood the message that I fell in love with the show.
Parents have the right to take their children to whatever they want. Trust me - they will most likely get more out of any Broadway production than they would a movie. AND the fact is that they most likely see worse on cable and hear worse at school. As long as they are good audience members, children should be able to attend any show their parents buy a ticket to. If their parents are educated about what they take their children to see, so much the better...
What I did not enjoy is the giggling teeny boppers in the balcony of Spring Awakening. In my opinion, maturity and respectful audience behavior is the name of the game.
So, that was the Drowsy Chaperone. Oh, I love it so much. I know it's not a perfect show...but it does what a musical is supposed to do. It takes you to another world, and it gives you a little tune to carry with you in your head for when you're feeling blue. Ya know?