May I jump in? In my opinion, we cannot control how we're wired, just what we do about it. A lot of things squick me, including incest, sexualizing children, and so on. But things just as bad are turn-ons for me--rape, for example. I believe that as long we understand the hard line between fantasy and reality, and stick to the fantasy, we are doing no harm. Calling someone evil for how the person is wired is how the lines get blurred--that's why we keep reading about right-wing Christian fundamentalists being caught with underage prostitutes. To them, the *desire* is evil, so actually doing something about it is just a little further along the line.
I've met people in the kink community who are attracted to children, and who play with other adults who pretend to be children, or read comics, or stories. I admire them for finding outlets for their desires that don't hurt anyone.
So, yeah, rather than games like this being part of the problem, I believe they are part of the solution.
Hope you don't mind my two cents worth.