I ran across this quote by Nathaniel Branden that seemed particularly appropriate for strict adherents of the principles of Molyneux and FDR:
"The Benefits and Hazards of the Philosophy of Ayn Rand" (1984)
Journal of Humanistic Psychology24
Branden says that adherence to Objectivism can result in hazardous psychological effects. Branden accused Rand and her followers of "destructive moralism", which he claims "subtly encourages respression, self alienation, and guilt."