Warning labels for books: This time in Missouri

The story is nothing new to librarians:

South St. Louis County-based Citizens Against Pornography is taking steps to see that parents are informed about sexually explicit material in books targeting young-teen readers — books that can be found throughout the St. Louis County Library system.

Because we all know that librarians are never available to talk about the books, and all teens mature at the same rate, and that a book is only the sum of its parts. Etc.

I think the scariest thing there might be the idea of an "Adult Advisory Committee." Would anyone who knows anything about YA literature serve on that committee, or would it just be people who read YA books for the good parts, or...?