Grace from Watsi here. I totally understand where you're coming from based on how the post is written - our fault for being hyperbolic. Of course, we would never walk through a hospital and record people without their explicit permission.
That said, what I've learned after talking with dozens of Watsi patients is that the overwhelming majority of them feel compelled to share their stories. They hope it will enable more people to access the healthcare they deserve.
Patient privacy is something we take really seriously. It is so important to us that Watsi funds cases regardless of whether or not the patient wants to publicly share their story with the world (https://watsi.org/faq#how-does-watsi-handle-patient-privacy) so that patients are never trading privacy for access to healthcare. More info here: http://blog.watsi.org/post/62445601517/patient-privacy
That said, what I've learned after talking with dozens of Watsi patients is that the overwhelming majority of them feel compelled to share their stories. They hope it will enable more people to access the healthcare they deserve.