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BBC News reports a call for governments and companies to limit the snooping they do on web users from Sir Tim Berners-Lee, inventor of the world wide web. He said that growing oversight of browsing could have a pernicious effect. A greater part of the value of the web lay in the lack of constraints on what people could do with it. He also warned that attempts to censor what people could say or what they could do online were ultimately doomed to failure.