Exactly. If a child wants to read something, they will find a way. One of my children was in 4th grade when all the hoopla about banning Harry Potter was popular. There were parent groups screaming to keep it out of schools and children having to go to other rooms if teachers discussed it.How exactly would I stop them? They weren't at home 100% of the time. Good grief. It's a BOOK. I encouraged mine to read. I'd be happy they were reading. I *might* comment on whether I thought it a good choice, but I would not stop them
My kid had plenty of friends whose parents forbid them to read the book come over and read it at our house. Others just read it at school in the library. The more you ban a book, the more enticing it will be to the child. Not a bad way though to get a non-reader to become interested in a book though