When it comes to poor productivity, the guiltiest party is often the last person to know—because no one tells them. Sometimes it's because their coworkers don't want to cause trouble or get in an argument. Other times they work around the unproductive teammate, because it's easier that way. What if you're the one guilty of ruining your team's productivity, and you don't realize it? It’s kind of like having broccoli in your teeth—you wish someone would tell you, before you embarrass yourself.