Although whistleblowers are extremely valuable to society, most of them suffer enormously for their efforts. Ostracism, harassment, slander, reprimands, referral to psychiatrists, demotion, dismissal and blacklisting are among the common methods used to attack whistleblowers. Bosses are the usual attackers with co-workers sometimes joining in.
Many whistleblowers are conscientious, high-performing employees who believe that the system works. That's why they speak out. They believe that by alerting others to a problem, it will be dealt with. Many do not think of themselves as whistleblowers at all - they believe they are just doing their job. So they are shaken to the core when the response to their public-spirited efforts is to vilify them as disloyal, to question their work performance, to withdraw emotional support and to mount attacks. As well as suffering financial losses and severe stress, whistleblowers are at increased risk of relationship breakdown and health problems.
Even worse than this, though, few whistleblowers seem to bring about any change in the problem they speak out about. The treatment of whistleblowers is a double disaster for society: capable and courageous individuals are attacked and sometimes destroyed, while the original problems are left to fester.
From: http://www.uow.edu.au/arts/sts/bmartin/pubs/05overland.html, by Professor Brian Martin