Among other things, what I recall about the conversation, and it was several years ago, had to do with the "Kentucky River" suit, where employers were trying to get certain nurses out of the union by declaring them management. The employers argued that anyone who supervised, trained, or
scheduled any other employees, was a manager and therefore ineligible for union membership. How courts decide suits of this kind, is still something unions are watching closely. I have heard nothing new, recently.
Here's one link to an article about the case,
http://dollarsandsense.org/archives/2006/0906bigman.html and I am sure there are others out there.
I would be interested to hear your thoughts on the topic on the slippery slope of Management versus Stage Management?