if an actor is difficult to work, has bad habits, etc . . . doesn't part of the blame fall of how that actor was MANAGED. Isn't it fundamentally part of our job to decrease the bad behavior and increase the good behavior?
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The real reason I would not pass on a "bad recommendation" to someone about their behavior is because ultimately, it would reflect negatively on me. "I let this actor get out of control."
SMs are just another member of the company and do indeed have a vital role to play in keeping things together; however, I would hesitate to place the blame for an irresponsible/rude/etc actor on the stage manager. Theatre is a team sport, and while it is important to find ways to work with difficult people, I would feel very offended if someone blamed an actor's poor behaviour on my inability to keep them in line. I will go as far as I can, but it is important to me that they do the same.
If it's a case of the actor having a different style of working, that's another matter and would be a great learning experience. But I don't think "this actor was diffficult to work with and the director and I had troubble keeping him in line" should reflect badly on me. Why should the actor not be held to the same standards as the SM? Even if I am doing a horrible job, should the actor not still be expected to turn out their best possible work? And in a situation where I am doing my share, I would like to see the people I am working with doing their share as well.