Saying Wal-Mart is antiunion is slightly less shocking than calling Tom DeLay unethical, or noting that I have an elbow*. Nothing could be better known. But I think most are confused, like I was for a long time, over how Wal-Mart can actually stop the unions. So one day, I called up an organizer buddy of mine and asked. The answer was so simple that it barely qualified as an answer at all. If workers unionize, or threaten to unionize, or feint at unionizing, or think about unionizing, or see a union hall on their way to work one day, Wal-Mart shuts down the store.