Paul Lewis, James Ball and Josh Halliday
London Guardian 
Aug 25, 2011
Analysis of more than 2.5m Twitter messages relating to the riots in England has cast doubt on the rationale behind government proposals to ban people from social networks or shut down their websites in times of civil unrest.
A preliminary study of a database of riot-related tweets, compiled by the Guardian, appears to show Twitter was mainly used to react to riots and looting.
Timing trends drawn from the data question the assumption that Twitter played a widespread role in inciting the violence in advance, an accusation also levelled at the rival social networks Facebook and BlackBerry Messenger.
The unique database contains tweets about the riots sent throughout the disorder, which began in Tottenham, north London, on 6 August. It also reveals how extensively Twitter was used to co-ordinate a movement by citizens to clean the streets after the disorder. More than 206,000 tweets – 8% of the total – related to attempts to clean up the debris left by four nights of rioting and looting.