The point that people are making is that while restricting overt internet porn does remove it from sight of a lot of kids, it will also continue to circulate as "samizdat" through whatever filesharing mechanisms exist. When I was at school someone got busted for distributing BBS porn on floppy disks, no network required. Now we have terabyte SD cards.

Absolutely true. When I was a kid a few people got in trouble for drawing and circulating pixelated “porn” on their graphing calculators. You can’t stop teenagers from being teenagers.