Any incident that disrupts a community where intervention is required to maintain public safety is a civil disturbance. Examples are demonstrations, riots, strikes, public nuisances, and criminal activities.
Hazard Identification and Vulnerability Assessment
In the United States, protesters and anarchists tend to practice civil disturbance at large, scheduled peaceful gatherings such as union marches or world and global meetings. They believe all types of governments and global organizations are oppressive and undesirable and should be abolished. Their activities involve disruption of activities, resistance, and rejection of all forms of control and authority. Modern anarchists are well-organized, using command centers, tactical communications, and the Internet for planning and operations. Control of anarchists requires police forces trained and experienced in the Incident Command System and riot control. Effects of anarchism include injury to participants and spectators and property damage.
The last decade has seen increased rioting and looting in the United States following sporting events. Generally, with populations of more than 100,000 are vulnerable to civil disturbances.