Seriously, shoot some of them, it's not like they're going to shoot back.
They pass all these ridiculous terrorism laws, yet can't pass a simple law to allow armed police officers to use lethal force in riots, without any repercussions. Obviously some common sense should be employed, like making public announcements for everyone to evacuate the area immediately and return to their homes within the next 30 minutes. Anyone who has not done so will be arrested unless they have a good reason for being there (shop manager, etc). Anyone who resists will be shot, no questions asked.