Actually they're looking for any pornography, not specific types.
Th Child Protection Act which they are trying to legitimize deals with stopping children from accessing porn not being present in it.
Basically they are looking to violate the whole concept of privacy to see whether some 12 year old found a link to some xxx site while searching for the hot coffee mod for Grand Theft Auto.
Well, I misunderstood the exact details when I first wrote, and then corrected it.
But I have no problem with the government trying to stop both child pornography AND access by children to pornography. That used to be taken for granted in the days before naked bodies were displayed on the shelves of the checkout counters.
I agree that there are right and wrong ways to do this, and that it is particularly difficult to control the internet, since it was built to resist any kind of centralized control or interference. But I don't think we need totally uncontrolled pornography all over the place, either. It wouldn't break my heart of they prosecute a few pornographers for selling to minors.