When I was in school many years ago, I remember a few students who frequently were given zeros for incomplete assignments throughout their elementary, middle school, and high school career. Twenty years later, these same students grew up to become adults who cannot hold a job; who are unorganized; and who are extremely irresponsible. According to some educators, these people should now be the most responsible people in the world.
Great teachers focus on mastery and a zero just isn't going to cut it. In many cases, a zero reflects two people who failed in the classroom.
Something to think about.