They don't have to be paranoid. That a whole sub-illness. If I remember correctly it's actually difined as a non-affective illness(non-emotional) with hallucinations as the prime symptons. (off course this may be non-true, becouse theré is actually some difference in how some mental illnesses are, depending on where in the world you live. Not sure if this is the case here)
To be honest(not to put don anybodys knowledge of this subject) I think you´ll have more luck finding objective stuff, by hitting the books.
That being said I', sure a lot of people have some stories or experiences, if that is what you are after.