There are many schizophrenics that can't be left unsupervised for 30 seconds. They are completely separated from society. Some don't attempt suicide several times, they are constantly attempting suicide. Some will laugh hysterically while they tell you about how they tried to commit suicide. Some will take a strange and unnatural pose and refuse to move, even when they are physically moved.
I'm trying to give you an idea of what can be caused by schizophrenia, basically I'm trying to say that schizophrenics can be total outsiders from society completely incapable of doing anything or passing off as normal if you watch them for even 10 seconds. I'm not saying bi polar is good but schizophrenia is really, really bad.