Twitter has confirmed it will attend a meeting with UK Home Secretary Theresa May and other officials about the role social media played in riots in London earlier this month. Facebook and RIM have confirmed their participation in the meeting.

It was reported that some rioters were using social media and BlackBerry messenger to coordinate the violence. Prime Minister David Cameron told the UK Parliament that they will be examining whether or not to ban the troublemakers from using social media and other digital communication tools. Harsh.

“When people are using social media for violence we need to stop them,” he said, to the chagrin of many free speech activists. “So we are working with the police, the intelligence services and industry to look at whether it would be right to stop people communicating via these websites and services when we know they are plotting violence, disorder and criminality.”