An item on a Saturday morning children's TV programme summarises the problem. The presenter, searching for a bookmark, solved his dilemma by tearing a page out of the book and using that.
As a school librarian I was horrified enough to complain to the programme. I received a patronising answer which assured me that I need not worry, as it was an old book which had been thrown away after the programme. There was absolutely no awareness of the message being sent to thousands of children.