Sure, that's reasonable. Your original comment sounded more like, "Why do people even care?" but I'm totally onboard with the idea that actually implementing something like that is very problematic.
From the customer point of view, though, "How do I know it's really them?" is a reasonable question because they don't really understand the implications of the answers.
> verification of authenticity is, to me, something that is just completely fucked in terms of even being an idea. Do these same customers get angry when they find out the movie they just paid to see was fiction?
I mean, I think they would if they were told it was a live broadcast.
Of all the fetishes out there, I think wanting to view a person in real-time is one of the more easily understandable ones. I am positive that there are plenty of people out there who prefer watching a live cam over uploaded VODs, even if they never actually interact with the model.
I'm sure that cam models are exceptionally concerned about privacy for very good reasons, and I don't think anyone should be obligated to provide live verification if they don't want to. But it's not like it's an irrational request.