Britain's Great Firewall of Cameron has just made the jump from "voluntary" to "mandatory." The UK government has announced that the demand that all ISPs offer an opt-out "adult content" filter will soon be a requirement, covering even small ISPs and ISPs that advertise themselves as censorship-free. ISPs will be required to operate filters that do not "unintentionally filter out legitimate content" -- effectively, this is a mandate to go shopping for magic beans. Jim Killock from the Open Rights Group sez: Read the rest