Is the Perfect the Enemy of the Good?

The use of performance-enhancing drugs is rife in amateur and professional sports, and one can only wonder what the level of drug use would be if vigorous testing efforts were not in place. But perhaps that is the wrong worry. Should we try to weed out performance-enhancing drugs from sports or any other venue of life? As long as what is being used is relatively safe and users are free to decide, are we simply deluding ourselves that use can in any practical way be banned? It may make more sense to try to articulate an ethic of performance enhancement than to maintain an illusion of abstinence.