In my heavily indoctrinated from birth JW opinion...
Mental illness is with the poor individual that is born a certain gender, but his/her ill mind is telling them they belong as a member of the opposite gender. Bruce Jenner is mentally ill.
A type of mental illness is with the female/male individual that feels sexual/love attraction with a person of the same sex.
Mental illness is with a tormented person that continuously tattoos/pierces/deforms themselves in some way, and of course, always with some sort of excuse/justification.
Mental illness is with the person that feels sad for no reason at all; all is well in their life, in a moment, and this subject is really sad.
Mental illness is with all involved in the Gothic movement. Sick looking for sure.
Varying degrees of mental illness is with the KKK and similar racist/divisive movements.
Mental illness exists in so many forms that is quite hard to find a well balanced individual.
Some poets have said that there's a bit of 'crazy' in all of us.
DY