This article on The Register describes problems with the mandatory internet content filtering being employed in the UK.
The service being used is filtering archive.org which is a free online archive of "the internet" for historical reference. This comes only weeks after the whole wikipedia.org service was also blocked due to a historically significant image (this article refers to the ban, which started due to a small image of an album cover from the band Scorpions from 1976).
These are two very high profile examples of how internet filtering cannot guarantee "false-positives", where legitimate websites are blocked from access.
The scary thing is that this is exactly the same technology being proposed by the Australian government to filter our internet access. The same technology that Senator Conroy says is unlikely to falsely block anything. Now we have two very well known legitimate reference sites that have been blocked.
The moral - FILTERING WILL NOT WORK.
