The way I've rationalized it, the game was freely available prior to the controversy, it's still available now, and I clearly haven't accessed the material, I think there's enough actual disgusting child porn out there for the government to concern themselves with. I have no intention of playing the game I doubt anyone else does either, it's an interesting curiosity, that's all.
Obviously you don't know how the government really works, even in the US. If they want to get your for something, they will. That game, according to US law, is child porn, no matter how stupid it seems.
The fact that you haven't 'accessed' it wouldn't matter to any overzealous prosecutor. Possession is possession.
Get rid of those things, and stop promoting them.