Virtual child porn is different. No child is harmed to make it. What this law did was to ban those images, but for no good reason. As I've been trying to get you to see over on that other thread, the government must have an interest in a particular matter before it goes passing laws. The government has no interest in protecting cartoon characters from pornographers. The law in question didn't outlaw the images because they are obscene. And it couldn't have been attempting to protect children from harm since no children were involved. It outlawed these images based upon an arbitrary criterion. It went far beyond the existing obscenity laws. As to the state laws, those may still be valid provided that they are based upon standards of what's obscene. If they are carbon copies of what Congress passed, then they'll be struck down as well.
No kiddin? And guys like you will support that because if the law is something you like then you are for a strong central government dictating to the masses.
Obscenity is in the eyes of the beholder, thats why obscenity laws are left to the states. To me, virtual kiddie porn is an obscenity, period. I'm well aware you have a different opinion and if your fellow citizens agree with you then you can have child porn to your hearts content.