A Not So Great Test?

Wall Street Journal talks about a urine test used to assure abstinence from alcohol. The report talks about a nurse and a pharmacist having lost their jobs after failing this test. The nurse has passed a polygraph test stating that she hasn’t drunk. The studies now show that this test that so many important decision may have been based on is not 100% reliable.
I wonder how many lives might have been adversely affected by blind faith in this test.