You’re insufficiently cynical, I suspect. Police, anti-MAP NGOs and vigilante groups are only vaguely interested in protecting children from harm. If they really cared about the kids, they’d be working to end the vast, degrading and debilitating global poverty and inequality which are inherent to capitalism, but that doesn’t float their boats. Instead, they grab the low-hanging fruit which is attacking MAPs and making them suffer as much as possible. It would indeed be possible and effective to provide harmless CGI but where’s the fun in that for the people who hate MAPs far more than they hate those who supply bombs to drop on school buses in Yemen? The counter-claim, as I’m sure you’ve heard, is that it normalises minor attraction and makes it more likely that viewers of CGI will assault children. For that, they need evidence. Is there any? So far as I am aware, there is not.