I've only met two people who admitted they had schizophrenia. It seems that if it is common, most people are not super willing to announce it. The second person was probably lying, but the first made a lot of sense with the paranoid schizophrenic framing. I'd be willing to bet most that are bragging or claim loudly that they have it are looking for attention; even if they do have it. Either that or they've stretched the definition of their symptoms extremely thin intentionally for a diagnosis.
