I’ve commented repeatedly in the past about how DUI roadblocks (MADD prefers the less oppressive term "sobriety checkpoints") are inefficient at apprehending drunk drivers. See Do DUI Roadblocks Work?, Do DUI Roadblocks Work (Part II), As a means of apprehending drunk drivers, even law enforcement admits they are only effective as a deterrent — i.e., keeping people off the streets. See DUI Logic: Roadblocks Effective – Because They’re Inefective, Purpose of DUI Roadblocks: "Shock and Awe". So why are cops using more and more DUI roadblocks? Simple: They are goldmines. See DUI: Government’s Cash Cow, What if the Cash Cow...