In my humble opinion, generally speaking, lay persons (and even specialists who have not done a proper evaluation) should avoid psychiatric diagnoses of individuals they casually know, as the implications of such a ``diagnosis'' can cause significant distress.
bagacrap|5 years ago
Besides, IMHO, we'd all be better off if more people were more informed about, and attuned to the symptoms of, narcissistic personality disorder and sociopathy. Narcissists thrive by blending into society as if they were normally functioning humans, being given the benefit of the doubt, so the only way to protect yourself or others is to be on alert at all times, regardless of your clinical degrees.