Grades are as bad as the Joel on Software mentioned in that education thread says. Whenever I have a good grade on something, I try to hide it from everyone. If someone does ask, I try to be cavalier since "grades don't matter," but I'm still ashamed of being perceived as selling out or being grade-oriented.
Our ca. daily grades in BACC202 Principles of Accounting 2 are group work, and our grades are based on pseudoanonymous group evaluations. That's better than being graded on the correctness of the work we do (that happens come test time), but most of us just randomly assign numbers to the different categories. How else does one answer, "Did this person work well with others?" with an integer zero through five?