Dave Murphy writes the best little commentaries every week in the Business section on ways to improve office culture, your own career, and the world of business. I always look forward to reading his columns. Here's an excerpt from a good one: Workplace harmony is wonderful -- if it's genuine. But the fiascoes involving the New York Times and the space shuttle Columbia should make us all realize that the pretense of harmony can backfire if workers are too intimidated to raise legitimate concerns.