Regarding a minor tone I detected. Mentally ill people are not by definition, stupid. Fairly often they are exceptionally bright and quite able to manipulate the system they live in up to a point.
For some the illness strikes their ability to be social, for some it affects their ability to learn, others yet are affected in their whole lives and some can be artistic and creative yet be unable to decerne the difference between good ideas and bad.
So remember that being nuts does not necessarily prevent someone from creating and effecting a solid plan of attack.