I love it when we talk about bootlegs here and everyone acts completely absolutist and that they're the most vile, harmful atrocities against mankind, and yet, are active consumers of bootlegs on Youtube and DM for PMs. The hypocrisy around here is very funny. I bet half of this board, if not more, are members of Forgotten Musicals or Broadway by Broadway on FB, which is bootleg sharing heaven.
There are definitely many layers of ethics to the whole thing--but I think most performers would concede that if they were nude for full houses night after night, that if those moments are on bootlegs, that it doesn't make a difference really. Of course, everything is subjective, and every performer has a different stance on bootlegs period. There's certainly an argument to be made of "I agreed to be naked for a limited audience in a theatre not on a bootleg for millions of people" which is valid. Truthfully, I think things only become "unethical" when it becomes for profit. I can't remember who said it, but I heard the quote "theatre for is for creating, film is for preserving", and I'm in agreement with that. So make of that what you will.