The moment we completely remove the element of shame from quitting we start raising a generation of quitters. That being said, there are extremes that I think should be avoided, and posting names on a shirt or poster is probably not the best idea (although it sure is fun to talk about doing it). I think it's o.k. to an extent to shame a kid for giving up as long as you are careful not to cross the line to the point that is becomes ridicule. You also need to consider how well that individual is able to deal with it. In other words; use your head, but that's probably a topic for another discussion, as comman sense seems to have vanished from our society at about the same time as accountability.