A child or adolescent who is diagnosed as conduct disordered usually bullies and intimidates others, picks fights and uses weapons that can cause serious physical harm. They are also deliberately cruel to people or animals. Youngsters diagnosed with this disorder lie, steal, violate curfew, run away from home, skip school, intentionally set fires or destroy property, and generally show a disregard for societal rules and the rights of others. Many of these youngsters appear to show little concern for the feelings of others and show no guilt or remorse for their actions. Conduct-disordered adolescents also engage in other forms of dangerous and undesirable behavior, including smoking, drinking, and drug use. An action, like the aforementioned in isolation does not constitute a diagnosis of conduct disorder, as the youngster would have to meet several criteria over a period of time.