What you could do is examine the strong correlation between the availability of pornography and reduced levels of sexual assault if you want to compare apples to apples. Not that I'm strong supporter of pornography, it's just that the study has been done, and the evidence appears to be on the side of porn if you're solely looking at the reduction in criminal behavior.

Dolls eliminate a portion of pedo behavior. Don't see how they're a problem, and they probably do society good.