On this note I've been thinking about whether there's anything actually offensive about capturing video in a public location. You're just capturing photons thrown at you. If someone doesn't want to be captured, too bad, they shouldn't be throwing photons at you (read: if they want privacy, they shouldn't be in a public location).
The human eye is a camera; the only real difference between your eye and your Canon is in material composition. One is made of organic material, another made of silicon and glass. In the future, I see this boundary blurring, whether in the form of digital prosthetic eyes for the blind (which inevitably would possess the hardware ability to capture video to a file) or in being able to understand, capture, and save neural signals out of our biological eyes directly. It will happen and is just a matter of time. So we might as well create a unified ethical framework now, built around the fact that the human eye is a camera; the act of seeing is videography; the act of remembering is data storage.