No, but there are some things like this that are dangerous to the already-vulnerable. Mind you, I agree with the OP, but I also understand the need for concern.

Having been anorexic myself, I can tell you that it is very peer-driven, so the condition can be made worse by reading more about it. And cluster suicide is also a real phenomenon-- sometimes, bad ideas do get put into the heads of teens who are open to bad ideas. Still, no excuse for banning books.