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.

hosts file isn't even the correct tool for this job. I don't know why this is being suggested a serious solution. I can add domain names and chose which IP address they resolve to. It can't even block websites.

If I didn't know any better I would assume you are spreading misinformation to put children into an unsafe situation