If your goal is to make mainstream porn less profitable, the Internet already did that. Amateurs are giving it away for free makes it tougher to earn a living selling it. The Internet is also why you won’t have much success keeping it from people. It’s really tough when you don’t need to get a physical item like a gun, a drink, or a pill. And we can’t effectively stop those things from being sold…not even in prisons. Do you really think you will stop people from accessing porn on the Internet?

Most of your moral arguments were also used by the prohibitionists. Alcohol was harming families and, ultimately, children.