Do you agree to do something then not do it? Compliment someone with an insult? The term Passive-Aggressive came in after the second world war to describe soldiers who weren't openly insubordinate but shirked duty through procrastination and wilful incompetence Passive-Aggressives can't show anger directly, so it comes out in all the wrong places. By failing, they show you up. You asked them to do the presentation that they didn't want to do, so they didn't do it. Teaching them to show anger is the best lesson, though once liberated it may never stop. You've then got a rageaholic with Mike Tyson's assertiveness.