&gt;  It seems unsuitable for coordinating mass protests to me, because it&#x27;s a single point of failure. In many countries, the government controls all Internet access, so blocking Twitter would be relatively easy. Sure, people can use Tor, but will enough people have it when Twitter gets blocked?<p>No, you can set up endless blogs (using Wordpress or Joomla or any other CMS with Twitter plugins), and include a twitter stream in it. You can post to twitter by email or using similar plugins.<p>A government cannot block all those sites.<p>Blocking twitter is not enough to block all content coming from and going to twitter.