you'd think it be deaf people, how could they have auditory hallucinations if they cant hear right? well thats not the case. Apparently deaf people can develop schizophrenia, and the auditory hallucinations manifest visually. some say they see hands signing words, or lips mouthing words.
its actually blind people. No person born blind has EVER developed schizophrenia. They are immune to auditory hallucinations. well i guess visual too seeing as they are blind but regardless I find this fact strange enough to share.
Dated a deaf chick once. She said in her dreams people basically have telepathy. Considering we can experience things like synethesia I'd guess it's just exceptionally rare to be both blind and severely mentally ill. Also the intro to that movie I Hope They Sell Beer In Hell is 100% accurate.