Tuesday, China’s government has blocked Internet users access to Twitter. Though there has been no official statement from the Chinese government, it is likely due to the approaching 20th Anniversary of the Tiananmen Square. The Chinese government may feel that this will curb any negative conversation that may have occurred otherwise.

This is not the first time China has blocked various social media sites, as they had a ban during the run-up to the Beijing Olympics in August 2008.

There are other reports that other social media sites have been blocked, including Flickr, Bing.com, Blogspot, and YouTube.

My question: would there ever be an appropriate time for the United States Government to block Internet users access to a site?