this is ridiculous. commom sense and that fact you should never harm real human beings starts in the home.
It is ok as a child to have an affinity towards blood, violence, horror movies, etc. Heck, when I was a kid, all I did was draw pictures of zombies, people with limbs ripped off, we played war games, i loved all sorts of gory stuff, etc.. .And I turned out fine as did my friends..
Ok you can stop laughing now...
These people want to intoduce legislation as an excuse because they are, to put it simply, bad parents. They don't want to be bothered with thier kids and spend the time with them it requires to teach them normal, good values. So they want the government to do it instead.