You're legally protected if job candidates voluntarily spill the beans about their employers' secrets, such as customer lists and manufacturing methods. But warn hiring managers to avoid asking questions aimed at extracting such secrets. For example, don't ask, "What were your biggest sales accounts?" Instead ask, "What was your role in developing your biggest accounts?" Example of the legal risk: A California court ruled a few years ago that Broadcom used job interviews to learn trade secrets from Intel employees it interviewed.