I think we must think about what the downside of kids maybe being introduced to porn really. Realistically, it is pretty low. Given that, we shouldn't really be giving up anything to try and stop it. I was exposed to porn several ways pre-Internet. Older siblings, news stands, late night cable. If I wanted more, I could get it. It was simply not a problem.

Maybe there is a problem for a tiny number of individuals, OK. A one size fits all approach like this still isn't the solution in these cases, though.

>I was exposed to porn several ways pre-Internet. Older siblings, news stands, late night cable. If I wanted more, I could get it. It was simply not a problem.

Yup. Me too.

And it goes back much further. Cf. "Pictures of Lily"[0] for a pop culture exposition from nearly sixty years ago. The point being that "porn" isn't anything new, nor was it difficult to obtain (hence a popular song about "porn") even before computer networks.

[0] https://www.youtube.com/watch?v=g-PHDR2yhxE&list=RDg-PHDR2yh...

Edit: For those who would cite the current ubiquity of "hardcore" porn on the 'net, I'd say that's a difference in degree, not in kind. Something to consider.