What term describes when the employer fired employees for joining unions and blacklisted them?

The term that accurately describes the act of an employer firing employees for joining unions and subsequently blacklisting them is blacklisting. This practice involves creating a list of individuals who are not to be hired due to their union associations, making it difficult for them to find work in the future. Blacklisting is primarily employed by employers to deter collective bargaining and maintain control over the workplace by punishing those who seek to organize or demand better working conditions.

The other terms listed do not accurately capture this specific behavior. Yellow dog contracts refer to agreements where employees pledge not to join a union as a condition of employment, Red starring involves actions taken to intimidate workers against unionization, and Blue hazing typically refers to initiation practices that are unrelated to labor rights or union activities. Thus, the understanding of blacklisting is crucial for grasping the historical and contemporary issues surrounding labor relations and workers' rights.