I've noticed this is true of most libertarians - they have not shame.
BTW, what statement is kiddie porn making?
Well why do we allow hateful thoughts towards our fellow man? After all isn't racism and bigotry towards race generally harmful for society? Shouldn't we punish such thoughts especially when accompanied by actions? I'm serious. I don't like what the KKK, neo-nazis, black panthers, islamic militants etc. have to say about groups they hate. They encourage violence through their rhetoric. Why do we allow these thoughts?
That is the road you walk down. You may say we can make a distinction between the two(porn vs. bigotry) but our hate crime laws say otherwise. Slander/libel and creating a panic should be the only restrictions the gov't should be able to place on our speech. That covers hate crimes, campaign finance etc.
Child porn is illegal. Doctored & virtual depictions of child porn are disgusting. I would report any I saw to the proper authorities(I am daily bombarded by such sites)so they may sort out what has happened. But the way the law was written, it was lazy and broad. The court said as much when declaring the law unconstitutional. Congress is free to pass a more specific law. That is what we will have to wait for.
But when these are artificial depictions, we are essentially punishing the thought of the creator of such. As vile as many of us find it, just as many have problems with that sort of logic. If this law were upheld, you can bet your bottom dollar that this would be used as a precedent cited to defend hate crimes as constitutional.