Welcome.
I have been recently asked to moderate this forum.
I am not a doctor, but I do have some first hand experience with these patterns of behavior.
What is Paranoid Personality Disorder?
This personality disorder is marked by an unreasonable mistrust of other people. He or she is often on guard, and often believes that others are harming, deceiving, or taking advantage them. The disorder is sometimes characterized by unreasonable suspiciousness and angry outbursts. ...