Speaking as a geek, with the hacker ethic, this bothers me...
(Not because they are censoring porn, it would be the same in my eyes of they were censoring stuff that was actually harmful.)
The internet does not belong to the government.
The internet is so powerful because it is not controlled.
But it is ONLY information, NOTHING is coming through the internet except information in various forms. Text, data, image, video, sound, programs, games. It's all just 1's and 0's.
The government has no business regulating, taxing, controlling, censoring, or managing it. They should not require a permit, they should not require identification, they should not require anything.
The service should be available by request, not MANDATORY to be disabled by request. (Which I assume you will have to sign something, or provide ID.)
Now what if you go to a wireless access point? Will it be censored or not? I'm willing to bet money that from now, people will be able to SUE the coffee shop because their offspring saw boobies while on the uncensored internet. Thus making public WIFI hotspots decide to keep the censorship, thus preventing the average customer from being able to use the internet properly.
"In Australia, which is supposedly a Liberal democracy, the government is saying that the internet is so full of this material that it must protect us from it by trying to block it."
I can't stress enough how BAD this is.