There are important implications here not only for the integrity of sports but also for public safety and law enforcement. If we want to ban certain substances because they are harmful to society we need a much more effective method to test for them. The ability to mask our physical conditions could otherwise have deadly outcomes. What if drunk drivers, for instance, are able to effectively mask their conditions and therefore participate in dangerous behaviors undeterred? What if an airline pilot is able to hide a drug addiction as effectively as Lance Armstrong?