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in Norway where the first ISP developed a filter (2002) Telenor worked with a special task force within the police. They have later developed the filter in conjunction with both Interpol and Europol.
I don't know how they come up with the sites to block, but Telenor reported an enormous amount of blocks (more than 5000 IP's a day in Norway alone) that still scares the shit out of me. So many people are surfing for this shit :/
In 2005 they implemented the filter on cellphones aswell.. so kudos to Telenor for their work!
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