UK Gov wants opt-in system for adult material, imagine a boot stamping on a trackpad, forever

Looks like Prime Minister David Cameron's not content with just shuttering the internet during social unrest (whilst condemning others who do the same). He's declared that four of the UK's biggest ISPs have entered into an opt-in system for adult material. The move is backed by the Mothers Union but has been flatly denied by the ISPs, who insist they're offering McAfee parental controls with new signups rather than Government-level web filtering. (Probably a massive let down to those eagerly waiting to delegate their parental responsibilities.) Of course, given the flaky nature of web filtering, any sanguine word that contained an expletive (the word "arsenal", for example) could be impossible to access until you had an awkward conversation with someone over the phone.