Damn, govt, get off the internets.
Porn is the very foudation of Internet's Maslow pyramid.
If you remove all porn from the 'net (which is near-impossible and not worth an effort), there will be the only one website left. It will read "Put the porn back".
And what the funk with all this opt-out bullshit? Why should I all of a sudden use the service I do not need and not even know about? If I want to filter my or my kid's (or sister, or whoever the funk is on my home network) browsing experience, I'd do that on my own gateway. I know better what I should and should not browse.
Which leads me to expect, that the true target of filtering is not really porn.