I do think the theatres and ticket companies could do a little more to make it known when a show contains "objectionable material". Not that they're at fault when something like this happens, but with something that could really upset people, it shouldn't be assumed that the public will be as observant or resourceful as it should be.
In a world where the blame is always someone else's, people need to be spoonfed information so they have no excuse when they make the wrong move. It's sad that with so much information available online at the push of a button, there are still so many uninformed consumers. On the other hand, I believe in a more natural approach to regulating what a child sees. If they are old enough to sit through it, I think they are old enough to be there. Anything over their heads should probably stay there, and any new words/ideas they retain are probably worth knowing. I'm glad to have learned my profanity from theatre and gangster rap rather than on the street. I may have been sent to the corner a little more often than the other 1st graders, but I had the satisfaction of having enriched the lives and vocabularies of my classmates.
"The last train out of any station will not be full of nice guys."
- Dr. Hunter S. Thompson
"I wash my face, then drink beer, then I weep.
Say a prayer and induce insincere self-abuse,
till I'm fast asleep"- In Trousers