Perhaps, but the questions must be asked, could experts in psychology and other behavioural sciences as well as experts in media technologies not have the ability to incite this kind of violence at will.
Has it not already been established that Films and other media based programmes have the ability to create emotional and physical as well as psychological responses in individuals?
To claim that these media resources could not be misused by intelligence groups is simply to ignore the history and all relevant research from the behavioural science field!
If a bunch of everyday average people can use facebook to incite the kind of violence and civil unrest that was seen in the UK, could not some of the best behavioural science experts in the world along with media experts do a lot more than that?
I believe that facebook has great power, however I am not sure that I trust that kind of powers in the hands of those that own it or with it being heavily influenced by the US government and intelligence services!