Nice article on the role of Twitter in the London riots earlier this year. The simple take-away from the research: almost no negative effects, with calls to riot completely overwhelmed by opposition when they were not totally ignored (which was most of the time), and a great many positive effects such as coordination of the clean-up and support for victims afterwards.
Address of the bookmark: http://www.guardian.co.uk/uk/2011/dec/07/twitter-riots-how-news-spread?newsfeed=true
