9thElement: I think it's debatable whether letting pedophiles mess with artificial creations made to resemble children will prevent them from progressing to harming real kids. Maybe for some it will, and for some it won't.
To me it's beside the point, as some things in life are sacred and children are one of them. I don't want to live in a society where it's okay to act out such violations even if it's only on an inanimate object, sort of how someone religious wouldn't want to see a statue of their God desecrated, except children are more important still as we all know they are real.
I don't think it's helpful to compare pedophile role-play using objects with the perversions of consenting adults who want to do rape fake-out etc. Perhaps more of a comparison can be made with men who want to rape for real, but even then those who want to do the same to children are one level of abhorrence above other rapists
This is a typical emotional response to a very real problem that the world is going to have to deal with some time soon.