Stop the anarchists
While thousands of Occupy Wall Street protesters are trying to protest peacefully, in come the anarchists who for decades have resorted to violence and vandalism at various assemblies around the world. These cowards hide behind hooded masks, inflict as much damage as possible, remove their masks and disappear into the crowd before the authorities arrive.
They also vandalize taxpayer-funded research institutes and often set free animals on which tremendous amounts of research have been done that some day may save their very lives.
So the question is: If the police cannot stop the anarchists, should the peaceful assemblers be justified to use whatever means necessary to stop these criminals in order to protect their peaceful assembly?
Preferably by using their numbers to incorporate citizen arrest.