There's merit to what you're saying, yes, there's an unhealthy push for hardcore stuff in the modern porn landscape. Yes, in excess it's bad (as is everything else, by definition, but this more than many other things). But mostly I just feel bad for your kid. I get if he's like 13 or whatever you don't want him immersing himself in violent rape porn, but I feel like there's better ways to solve that than "no internet for you, and internet you do have is Being Watched".
Also unimportant, but does anyone develop a porn habit not in secret?