UW as distasteful as the idea is that someone might be getting off on those pics, it's still a matter of prosecuting someone for thinking rather than doing. I can think about blowing up buildings without doing it. I'm thinking it right now... and now I've said it, so are you
The hysteria about pedophilia has become a major political issue and it's driving censorship everywhere. We've had a second prosecution in Australia for possession of sexually explicit cartoons of the Simpsons. And as seem with the small boobs issue, if a model "looks" young, it's an illegal image.
We're already into the realm of thought crime prosecutions and I find that very disturbing.