Yes, social media brings social change:
The Internet and mobile phones have taken on a major role in Iranian politics over the last several months. As protests over the contested election results continue in Iran, the government has dramatically increased its control over digital technologies. Many important Web sites have been blocked over the past couple of days, including the Web sites of the opposition parties in Iran, Facebook, Twitter, and YouTube. While political organizers have learned to leverage the organizing power of Web 2.0 tools, government censors in Iran are quick to shut them down when they are most effective. None of this is surprising; it reflects similar events seen in many places around the world.