A major study of the web-blocking tools used by mobile operators has revealed that the filters are erroneously censoring scores of legitimate websites, and run with little transparency. The criticism comes from the Open Rights Group, which has been studying which sites mobile users have had problems accessing. […]
Mobile operators routinely use web filtering technology to restrict access to websites which may contain adult material. Between 1 January and 31 March, users reported blocks on sites as varied as Tor Project, La Quadrature du Net and eHow. […]
http://www.v3.co.uk/v3-uk/news/2174512/mobile-operators-criticised-stringent-web-blocking-practices