You've strayed considerably from your initial argument of contraband playboys being prevalent before the internet. Playboys were prevalent, yes, but not magazines with graphic depictions of violent fetishes. That such magazines existed at all isn't disputed.

> BDSM has been a thing for decades

But decades ago it was not possible to reach content like that in a few seconds, using magical device we carry 24/7.

I was taught about sexuality from a very early age, by very liberal and loving parents, which was extremely unusual even in one of the most liberal places on earth. And that involved seeing sex scenes and nude images and completely open conversations about sex acts, anything I wanted to ask. Above all, they stressed respect, consent and health.

Parents now would probably be arrested and their kids end up in foster care for giving their children a similar education.

What did not exist in that that time was the avalanche of extreme content that has become mainstream and accessible to the point that it would even overwhelm my own parents' teaching methods, let alone those of most parents who were much less open or equipped to have such conversations.

I encountered BDSM porn around the time I was 12, and was groomed over IRC by an adult posing as a minor who wanted to have sex (this was 1992). That person sent me VHS tapes in brown boxes through the mail. I can't stress how extreme and unusual this was at that time, and I'm lucky I had the parents I had.

My rationale for thinking that this is a problem is that (1) most parents do not prepare their kids for this, and (2) such a thing becoming commonplace is a massive societal burden that will result in psychological damage not just to individual kids, but to their own offspring and to society as a whole.

Letting children see nude pix in Playboy and explaining to them how sex works has been considered taboo and borderline abuse since I was a kid in the 80s, but my parents did it anyway. I agree with you that educating your kids is the best way to protect them from real abuse. But in this context, the outside world has to be considered all groomers and abusers. The world is full of pedophiles and people who want to take advantage of others. Porn sites and the infiltration of extreme BDSM into the mainstream are examples of this. I stress that it's fine for adults and no adult should have their private lives pried into by any government. I'm just saying that there is a real problem, societally, with allowing kids to be exposed to the lusts of random people on the internet, and that problem will compound over time until you have a society like Russia or Appalachia where everyone is raped at 12 and rapes children when they're adults. In other words, a death spiral.