Formality won&#x27;t reduce betrayal but instead prescribe behavior that lets one fully mask intention of betrayal.  When expected behavior norms aren&#x27;t fully prescribed, or when they&#x27;re impaired (as when one is drunk), it&#x27;s harder to maintain politeness.  Downton Abbey-style formality, on the other hand, lets one maintain the facade of perfect society while stabbing someone&#x27;s back.