Well, being that I am not a psychiatrist, I can say in my unprofessional opinion that Barry Obama suffers from Narcissistic personality disorder and never should have been a Senator let alone the President of the United States.
And that is perfectly within the bounds of medical ethics.
Sure. There is a mountain of evidence.
Sure, but it's worth no more than the opinion of anybody else -- maybe worth a lot less.
The "Goldwater Rule" was a good one -- not just for mental health professionals, but for everybody.
When conservatives objected to psychoanalysts labeling Goldwater crazy, they were right.
When everybody started throwing around diagnoses of people they'd never met, they were wrong.