Each individual is one of four types of people, according to G. Keith Still, a crowd management expert. The proportions of crowd types change depending on the type of event. Good crowd management can calm people who might otherwise instigate or imitate. The majority of people are nonviolents, but all it takes is a few individuals to spark a crowd incident, Still says. For example, consider extra monitoring and alcohol restrictions at a sporting event between rivals, while a rock concert will demand good stage design and ticketing policies.”]
Source: https://www.csoonline.com/article/2121820/know-your-audience.html