It's a moronic policy and almost literally backwards: someone leaked the fact Perry and No 10 sent ISPs a copy of the press release they had written, then asked ISPs to deliver an agreement close enough to render the press release's claims plausible. They don't care about fixing problems, they wanted to make their press release come true!

Somebody recently sent a batch of "adult" DVDs to random addresses down in England; it seems there was a premium rate number to phone to pay and unlock the content, or to unsubscribe. Of course, by Perry's logic Royal Mail should now be required to open all our mail to filter such things out, unless we ask them not to! Sadly, she still seems to think the Internet is like a TV channel, that ISPs make a decision about what the content is - and of course the less scrupulous filter vendors she asked to market their products to her little show-panel were happy to oblige.