But if the ban were to make it into the final law, it would likely do more harm than good. Though a few studies have found that, under laboratory conditions, porn makes men more sexually aggressive, there’s no real-world evidence bearing out the claim that this translates into sexist attitudes or sexual violence. According to Professor Milton Diamond, director of the Pacific Center for Sex and Society at the University of Hawaii at Manoa, “[t]here’s absolutely no evidence that pornography does anything negative.”
There is, however, empirical evidence that it reduces the incidence of sexual violence. One 2007 study by Todd Kendall compared the rates of crime between U.S. states with greater and lesser access to the internet. After controlling for other crime-inducing variables (like rates of urbanization and alcoholism), Kendall found that more internet access led to lower rates of two crimes only — rape and prostitution:
I find that internet access appears to be a substitute for rape; in particular, the results suggest that a 10 percentage point increase in internet access is associated with a decline in reported rape victimization of around 7.3%…internet has no apparent substitution effect on any of 25 other measured crimes, with the exception of the only other well-defined sex crime, prostitution. Moreover, I show that the effect on rape is concentrated among states with the highest male-to-female ratios, and that by age, the effect on rape is concentrated among teenage men, who are the prime consumers of pornography, and for whom the internet induced the largest change in availability.
Two other studies support Kendall’s finding — one correlating the international spread of the internet with a concomitantly international decline in sexual violence, the other presenting survey evidence that, as Scientific American puts it, “patients requesting treatment in clinics for sex offenders commonly say that pornography helps them keep their abnormal sexuality within the confines of their imagination.”
Proponents of such laws that prohibit pornography actually endanger women and children. This has been conclusively proven by academic researcher Milton Diamond and others.