I don't know about stress relief, but I don't see any reason that crew resource management couldn't be applied to any team of individuals who need to work together to complete a task. For example, in the case of the security screeners it would be easy for one disturbance to cause many of the screeners to neglect their own duties and either slow the line to a halt, or fail to properly screen the folks in their queue. Much like that famous accident where all three crew members were focusing on a burned out light and no one was left flying the plane.