Chatter, I am only guessing here that you pointed at histrionic as an example and that somewhere in cluster B would be the more general. Some appear more borderline, some more narcisitic, etc.
Cluster B (dramatic, emotional or erratic disorders) Not to be confused with Type B personality.
Antisocial personality disorder: a pervasive disregard for the rights of others, lack of empathy, and (generally) a pattern of regular criminal activity. Borderline personality disorder: extreme "black and white" thinking, instability in relationships, self-image, identity and behavior often leading to self-harm and impulsivity. Borderline personality disorder is diagnosed in three times as many females as males.[13] Histrionic personality disorder: pervasive attention-seeking behavior including inappropriately seductive behavior and shallow or exaggerated emotions. Narcissistic personality disorder: a pervasive pattern of grandiosity, need for admiration, and a lack of empathy. Characterized by self-importance, preoccupations with fantasies, belief that they are special, including a sense of entitlement and a need for excessive admiration, and extreme levels of jealousy and arrogance.
What is also interesting is some appear to have bi-polar characteristics.
And again, cluster B is chronic, not this temporary stuff we might observe in someone suggested to be MLC.
So again, regardless of the label, how would one deal with an emotionally unstable individual through this, if we don't want to call it MLC?
Tell them to brain up or we'll kick you to the curb?
Seems an interesting way to deal with someone with a mental health issue, even if it that issue develops late in life.
What about someone who gets a head injury or some other non-curable condition in this situation at any stage of their life? The symptoms remain similar in many other medically proven conditions.
