I think they always have a human in the loop, but that won't scale. http://en.wikipedia.org/wiki/Internet_Watch_Foundation_and_Wikipedia is the only incident of IWF overblocking I've heard of, but it's not something I've been looking out for.
Presumably any new system will be more similar to the existing mobile internet blocks: https://www.openrightsgroup.org/blog/2011/how-does-mobile-internet-filtering-work http://www.pcpro.co.uk/features/382633/mobile-web-blocking-what-it-reveals-about-porn-filtering-plans
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Date: 2013-07-23 03:49 pm (UTC)http://en.wikipedia.org/wiki/Internet_Watch_Foundation_and_Wikipedia is the only incident of IWF overblocking I've heard of, but it's not something I've been looking out for.
Presumably any new system will be more similar to the existing mobile internet blocks:
https://www.openrightsgroup.org/blog/2011/how-does-mobile-internet-filtering-work
http://www.pcpro.co.uk/features/382633/mobile-web-blocking-what-it-reveals-about-porn-filtering-plans