Spy Journal 3.0 Filtering the web for you

There is a huge public discussion on internet pornography. Whether we realise it or not, porn is a very large (read profitable) part of the internet. Censorship is being considered and lots of organisations are calling for governments to variously protect children, filter porn, provide regulation etc.
Worthwhile organisations like the Australian Family Association have posted articles calling for an urgent mandatory filtering of pornography at a national ISP level and make statements like this Every Australian has a fundamental right to access the internet free from pornography and extreme violence.
While I completely agree with the intention behind these statements, they fall short in a number of areas.
The first area where these ideas fall down is the actual concept of censorship and responsibility.