indeed no isp or gov't should be allowed to censor any information, unless that information's critical to national defence or something (and even then, i would be really dubious of the claim). Whether it is porn or not doesn't even come into the argument, because the issue is not with the contents, its with censorship itself as a concept.

It's an optional filter. People can ask to have it turned off. It's a voluntary filter that the companies chose to implement before government forced filtering on them.

It's baffling to me to see this described as censorship. The content is still there. People can still get the content, they just need to say that they want to get the content. Sometimes they need to prove their age. (In the UK we have some legally mandated minimum ages; when a cinema says '15' it means you're not allowed in if you're under 15.)

As I've said, there's a problem with the filter being opt-out rather than opt-in; and there's a problem with the filter being too broad and blocking things that it shouldn't.