You also paint the picture of a new porn-DEA. I don't know what to say to that, except that I don't favour Sharia Law.
I posit that the ever expanding scope of liberalism with regards to intra-sex dynamics is the (or, at one of the) causes of much despair and grief, because they inhibit pair-bonding, family formation and are deeply non-lindy for various reasons. We see this in the number of older women taking anti-depressives, we see this in levels of male celibacy unprecedent since the middle ages, and collapsing populations all over the western world. None of these questions and dilemmas are new, they are as old as time. The idea that the rules have suddenly become invalid is naive at best, and destructive at worst. This will be non-obvious if you approach this from the viewpoint of enlightenment philosophy. It will become quite obvious if take the historical perspective on human behaviour and how societies function.
It doesn't matter.
Or rather, if the only idea you have for solution to the situation is repression, it doesn't matter what you think of the impact of porn because you're not going to stop it, you're just going to create "porn and repression, together" just like the war on drugs created drugs and repression together.
Guns and small pox weren't net wins for a lot of societies they were introduced in but once things start with certain processes, you kind of need to find mitigation, not a heavy handed repression.
And sure, a better for people to relate together than exists currently would be great but shoving the genie back in the bottle isn't going to it.