We've been arguing for a while that attempts by various governments to shut down forms of communication during protests and riots only serves to make protesters and rioters angrier. Some new (quite timely) research, pointed out by Mathew Ingram, seems to agree that internet censorship tends to make such problems worse. The research is a quick read, and certainly goes further than efforts like L. Gordon Crovitz's "it's okay if the world didn't end."
The key part of the research is that it models the behavior of protesters in various cases, using proven simulation techniques. It's really quite fascinating to see how they model "civil violence." While simplified, it definitely can be useful for modeling how people react in certain situations, and it appears to have a decent track record.
The agent's behaviour is influenced by several variables, the first one being his/her personal level of political dissatisfaction ("grievance", indicated by lighter or darker shades of green colour in figure 1). This can lead the agent to abandon his/her state of quiet and become an active protester (red coloured circles in figure 1). However, the decision to act out -- whether it is to go on a looting spree or to engage in violent demonstrations -- is conditioned by the agent's social surroundings ("neighbourhood" in the model's language). Does s/he detect the presence of police (blue triangles in figure 1) in the surroundings? If the answer to this question is no, s/he will act out. If the answer is yes, another question is asked: is this police presence counterbalanced by a sufficient number of actively protesting citizens? If the answer to this second question is yes, then the agent acts out. Sometimes, in an utterly random way, one of the active citizens gets caught by the police and is sent to jail for a given period of time (black circles in