When I went to CM motor school, one of the first things he said was they don't recommend hanging over audience period. Happens everyday but that was CM's stance.
Good question. I am getting ready to attend a Stagemaker motor school, I will ask them the same question. Especially since I just ordered 24 hoists to hang curtains around my second floor bowl, much like the OP. I am insisting that we set the house to anticipated masking and not change once the house is open.