Summary of a conversation I had this week:
Parent: My kid said you will let him read whatever he wants! Is that true?
Me: The short answer? Yeah. Anything available to the public he is allowed to borrow.
Parent reply: He's only 9 years old! The library is full of subjects he is not mature enough for yet! You are going to let him borrow anything!?!?!
Me: As long as he checks it out with his library card... yeah, pretty much.