If anorexia nervosa (self-starvation) exists as an illness, would it would be equally logical to say that political hunger-strikers suffer from anorexia politica (self-starvation for political ends)?
This is discussed in Insanity: the Idea and its Consequences.
No behaviour or misbehaviour is or can be an illness or a disease. .....
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The idea of mental illness and insanity can be used to absolve the guilty and punish the innocent.
There is no such thing as mental illness, insanity or madness; there cannot be such things as mental illness, insanity or madness.