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.