Nastiness devalues the speaker as well because the unwillingness to restrain the urge marks the speaker as less civilized, more animal-like.

Una "persona" hace lo que debe, cuando debe y donde debe. Una "bestia" hace lo que le da la gana, cuando le da la gana y donde le da la gana.

Why should our nastiness be the baggage of an apish past and our kindness uniquely human? Why should we not seek continuity with other animals for our 'noble' traits as well?

Man, I can assure you, is a nasty creature.

It may take a short while, but we'll get that nastiness of the Raiders back.

Never act surprised in a courtroom.