Clinton's Communications Decency Act tried to do just that and was shot down by a unanimous Supreme Court.
With no real people involved, you're advocating absolute control over individual's freedom of expression.
—Why is that scary? What is wrong with you? —
I don’t know that anything is wrong with me, beyond the normal stuff (the doctor says I may get out in a few months) Regarding the scary part:
It means that child pornographers can profit, and are therefor incented, by making CGI child pr0n. Sure, maybe no children are exploited in the actual making of the film, but unless you are one of those who advocates that pr0n “releases” the desires that would otherwise well up to cause you to attack real people, it means those who purchase and download this stuff will get the same dosage of the material they get with the “real” and illegal stuff.
And the fact that it is made illegal by the fact that real children are used currently is only part of why it was made illegal, but enough to nip it in the bud. The advent of CGI bypasses the laws and allows the product to be freely sold.
And it is believed by many that pr0n only increases the problem for its customers.
That’s why it’s “scary”.