Extreme paranoid delusions are usually what kinds?

Variety of delusions. Delusions (demonstrably untrue beliefs held with strong conviction) can be classified as either non-bizarre or bizarre. An example of a non-bizarre delusion: "the police are monitoring my behavior." example of a bizarre delusion: "aliens have removed my brain." a "paranoid delusion" typically refers to a delusion of persecution, or a belief that someone is intending one harm.