"Rude" Behavior Spreads Like a Disease

"Collectively, the data from Foulk and colleagues highlight the dangers of low-intensity negative behaviors, even those that are merely witnessed rather than personally experienced. With negative behaviors, the witness becomes the perpetrator, just as the person who touches a doorknob recently handled by a flu sufferer can themselves get sick and infect others. No conscious intent in necessary, and the contagion may last for days."

"People exposed to rude behavior tend to have concepts associated with rudeness activated in their minds, and consequently may interpret ambiguous but benign behaviors as rude. More significantly, they themselves are more likely to behave rudely toward others, and to evoke hostility, negative affect, and even revenge from others."