@spendius,
And you're really naive to think this filter can thwart hardcore criminals who are determined to get the illicit fodder they are known to traffic on the internet underground.
This filter isn't going to stop phishing and malware sites nor abhorrently disgusting and violent porn.
Not to mention that the average citizen will still be able to find the illicit and allegedly filtered contraband (intentionally or accidentally) as computer science departments around the world always argue that these filters are buggy and inconsistent.