In June Google revealed that 45 countries had asked it to block content in the last six months of 2011. Some requests were easily rejected. Officials in the Canadian passport office asked it to block a video advocating independence for Quebec, in which a citizen urinated on his passport and flushed it down the toilet.
Most firms do accept that they must follow the laws of countries in which they operate (Nazi content is banned in Germany, for example). Big internet firms can prevent users accessing content their governments consider illegal, while leaving it available to visitors from countries where no prohibition applies. Some pledge to be transparent about their actions—Twitter, like Google, releases six-monthly reports of government requests to block information. It also alerts citizens when it has censored content in their country.
Legislators in America want more firms to follow suit. In March a congressional subcommittee approved the latest revision of the Global Online Freedom Act, first drafted in 2004. This would require technology firms operating in a designated group of restrictive countries to publish annual reports showing how they deal with human-rights issues. It would waive this for firms that sign up to non-governmental associations that provide similar oversight, such as the Global Network Initiative. Founded in 2008 by Google, Microsoft, Yahoo! and a coalition of human-rights groups, it has since stalled. Facebook joined in May but only as an observer. Twitter is absent, too.
Read more here