@CravingCheese
Anyhow, laws aren't necessarily limited by a state's territory. At least not in an absolute manner.
It's absolutely possible to criminalise certain acts committed abroad (treason, terrorism, pedophilia...) and to prosecute the perpetrators... which has indeed been done.
Laws generally only apply in the jurisdiction that makes them. Yes it's possible (in the UK at least) to criminalise acts that happen outside the jurisdiction (e.g. Gary Glitter) but that's irrelevant if the person concerned never enters the UK. If a website showing clear abuse is located in, say, Kazakhstan, the people behind it won't get prosecuted in a British court (unless they happen to be in Britain).
Or you can prosecute people in the UK who download objectionable material, regardless of where the server is located. But that only works if the material is, on the face of it, clearly criminal, for example, child abuse. I don't see how you draft a law that wouldn't potentially criminalise anyone who uses sites like Pornhub, even if they would be horrified to discover the video they got off involved abuse. And that would be absurd, because such a law would become an immediate dead letter unless the government intends to start prosecuting millions of people (which won't happen either). So regardless of whether that is right or wrong I simply don't see how it could happen.
Not to mention how do you stop material like this being spread in the first place so women don't have to fear reliving the very worst moment of their lives every time they switch on a computer or a phone. To my mind, that's the most important thing of all. The victims rights should be put first. If it had to be a choice between prosecuting people who spread abuse videos and simply preventing dissemination of videos I believe the victims would choose the second - and right now it's simply impossible to do this.
The only way you do it is by imposing firewalls along state lines, like China has (and Russia is beginning to have). That is to say, if you want to view whateverdodgyxxxwebsite.com hosted in Mongolia, well tough, you can't.
And yes, you can also make the same points regarding online purchases e.g. clothes. If you want to prevent purchases of clothes from factories that exploit their workers, you basically have to ban them. This is way bigger than porn.
So I think it's true to say that it's impossible to regulate porn that doesn't, on the face of it, clearly record abuse. And this will not change until the Internet starts to split up, something that I think is starting to happen.