A book is just a medium, the use we make of it defines whether it's good or bad. I just wouldn't want to see it accidentally find a place in a children's library (mostly because the illustrations would easily have an adult confused).

As I said, I laughed at first, but my mind went to make all kind of scenarios. But I do want to believe they are nothing but a joke and we should just be a little careful when going out to buy books as presents or when someone tries to "equip" a children's library.