Parental alienation varies in the degree of severity, as seen in the behaviors and attitudes of both the parents and the children. The severity can be of such little consequence as a parent occasionally calling the other parent a derogatory name; or it could be as overwhelming as the parent's campaign of consciously destroying the children's relationship with the other parent. Most children are able to brush off a parent's off hand comment about the other parent that is made in frustration. On the other hand, children may not be able to resist a parent's persistent campaign of hatred and alienation.