My ex fil is one of the mentally ill people who should absolutely never have a gun... but he does. He owns several, actually. He's a Vietnam vet with severe ptsd. He's been an alcoholic for years and has a decades long history of domestic violence. About ten years ago, on the fourth of July, some kids were outside shooting off bottle rockets and it triggered him. He went outside, yelling and swearing, and threatened them with a shotgun. But, if you ask him, he's a good guy with a gun.