Twitter is used by different people for different things. It’s a communication tool for some, a news aggregator for others, and a way to spread a message for individuals and groups around the world. From the perspective of the US government, it can be a beacon of freedom as well as a source of international intelligence, which is why it makes no sense that Senate Homeland Security Committee Chairman Joe Lieberman is leading the charge to have Twitter block propaganda being spread by Islamic extremists. The Senator cites a portion of the Twitter terms of service that states, “You may use the Services…