Public anger is the collective anger of citizens or large groups of people that come together for a common cause. This type of anger has led to riots, protests, marches, public outcry, etc. Public anger occurs when people feel that there is a social injustice. They bond together to voice their feelings and opinions. On a large scale, people often feel anger when they are frustrated - when they want something and aren't getting it, when they feel they are not being heard, or when they feel that things are unfair. In sum, public anger is a way citizens try to bring justice to their cause.