I just think the premise is completely flawed
'Their argument is that pornography causes sexual violence, molestation of children, sex trafficking and other maladies.'
I don't believe that porn causes all of these things (outside if the industry itself). I don't know any figures but I wouldn't expect porn to increase the incidence of stranger rape (apparently down). Maybe rape within partnerships which I imagine is little reported. But it's more that porn affects attitudes towards women, and about women of themselves, and I imagine the type of sexual activities women are expected to participate in.
'Based on the evidence, it would be easier to make the case that adult entertainment is beneficial than that it's harmful. Harvard economist Benjamin Edelman even found that in places where porn subscriptions are most popular, you find more people "donating blood, engaging in volunteer activities or participating in community projects."' this is just a correlational link with no explanation (at least from this journo) as to why there might be a correlation, certainly not evidence of porn use causing community behaviours.
'In any case, what business is it of Hatch or Holder what adults choose to view on their home computers? If we can tolerate racist literature, slasher videos and the Westboro Baptist Church, we can put up with adult entertainers at their most indiscreet.' but most decent people do not tolerate the above! Again, flawed premise!
That's just my initial, inexperienced analysis of why it is a pile of shit.