Wow, yes I do. I think both my parents are mentally ill. My mother, technically, only has a "condition." My father though, I believe at some point lost touch with reality and I would not be surprised if he was diagnosed as insane. He's not that old either, just 55.
My grandmother definitely suffered from hallucinations. My father also refused to admit she was mentally ill. She only got medication during the last few years of her life after revealing her hallucinations to a doctor, who reported my father, and then Adult Protective Services got involved.