A good starting point for all employers when attempting to minimize the risk of workplace violence is to conduct a hazard assessment, and then provide employees with the protective measures needed to eliminate or reduce exposure to potential hazards.
People will not risk their jobs to speak up about problems. They cannot afford it. That is reality. It is the very reason why the Occupational Safety and Health Act has protection for whistleblowers. It is also the reason for the Federal Whistleblower Protection Act (WPA).
Results from the 2010 National Health Interview survey
January 15, 2014
A recent NIOSH study published in the American Journal of Industrial Medicine showed that more than 7.6% of working Americans reported that they were mistreated at their workplace in 2010, and this mistreatment was associated with a 42% increase in the number of missed work days, controlling for covariates.