I don't like racist or sexist opinions either but I still respect a person's entitlement to believe what they want, however pathetic it may be, or however irritating it may be to me. You don't have to look at their blog or website because it isn't being shoved in your face or infringing YOUR entitlements. If they came to your door and started picketing their opinions in your face then yes, I think they should be stopped. But otherwise, they should have their say because I would not want to be in a position myself where someone told me I could not have MY say, simply because they do not like what I am saying.
It's easy to be complacent about internet freedoms, but our government will use any retaliations (which it will call "cyber terrorism" probably) to its advantage and we're generally such an unperturbed nation we can and do put up with almost anything from them. We've already lost many freedoms and our government already snoops on us. They've already slanted this law like a lawyer would, so that anyone opposing it would automatically be asked "so you think children should be able to see adult material? So you think pedophiles should be allowed to continue doing what they do? So you think rape porn is good?" etc. which would obviously reflect badly on the person advocating an unfettered internet.
I simply don't have faith in the idea that freedom will prevail without fighting to maintain it. Look at China and NK. They exist and they don't believe in it at all. Shrugging shoulders and saying "that'll never happen" is asking it to happen because governments always want more control. And right now they're eyeing up the internet as the best thing that ever happened to them, something that, if under their control could give them more information about what their citizens are doing than they could dream of, could provide a means for them to censor out what they don't want people to see, and a means to pipe in what they DO want people to see. If controlled, the internet would be the ULTIMATE spying and propaganda tool.
I'm hoping for a U-turn on this ridiculous porn block web censorship thing, but it's only going to happen if there's a public backlash and the implementation is shown up to be worse than useless. Otherwise these fools in power (and they do appear to be stupid, because they don't seem to know how the internet actually functions) are going to continue to think they can do as they please with it. Because it won't be just porn they'll be blocking, I'd guarantee.