Taken from here.
A great piece by Merrick on police tactics at demonstrations and the complicity of the media.
It seems clear that the police’s aim is to minimise the number of demonstrators. Having talked up a riot in advance, they discourage many people who are sympathetic to the cause from coming out of fear of injury. Then, on the day, by inciting a riot, kettling the crowd or other methods of physical abuse, they discourage people from coming to similar events in future.