Civil society demands a certain amount of diplomacy -- even if those rude co-workers in the comic strip "Dilbert" are pretty funny.

But planes have crashed and patients have misunderstood diagnoses as a result of people being too polite. Indeed, the higher the stakes, the more polite people often get -- exacerbating the static that disrupts effective communication, according to an article published recently in a journal of the Washington, D.C.-based Association for Psychological Science. It's a problem, and some businesses -- including a number of airlines -- are addressing it by training employees in how to recognize when the time has come to skip the finesse and be blunt.