I had a law prof once correct a student: "If we all just tell lies then this entire system breaks down." People hiring ringers, telling lies during the examination process, is a problem. It it isn't a statement against the concept of examinations. The answer is to make it difficult to cheat (ID etc) and establish appropriate punishments to dissuade. The ability to cheat illustrates a flaw in the testing procedure, not any flaw in the actual test.
