The U.K porn ban includes more than just porn, according to participating ISP providers that spoke with the Open Rights Group. In addition to the opt-in requirement for porn, ISPs will also automatically ban a slew of other content areas that have nothing to do with porn. TalkTalk, one of the ISPs praised by Prime Minister David Cameron for its "great leadership" in implementing the Homesafe program, has a screen like this, with all of those boxes checked. Note the inclusion of less porny site-types like social networking and dating. 

Other services will have something similar, with "the precise pre-ticked options may vary from service to service," according to Open Rights Group. Since people generally stick with default options, the set-up encourages people to "sleepwalk into censorship," says the Open Rights Group. 

To make matters worse TalkTalk's Homesafe is run by Huawei, the controversial Chinese tech company with significant ties to the Chinese government. The partnership has some free-speech groups worried that all of the censorship decisions are going through a foreign government that also happens to have a penchant for suppressing free speech. Both Huawai and TalkTalk employees can decide what websites end up on the blacklists, a cause for concern. "It needs to be run by an organization accountable to a minister so it can be challenged in Parliament," Dr Martyn Thomas, chair of the IT policy panel at the Institution of Engineering and Technology, told the BBC

Prime Minister Cameron has given the ISPs the option to choose who runs the program, and has promised monitoring to ensure that the filtering is done right. But, really, how will anyone know? "There's certainly a concern about the process of how a web address gets added to a blacklist — who knows about it, and who has an opportunity to appeal against it," added Thomas.