Yes. And my wife and I have found that a large number of people don't like being photographed. We always ask, we buy something from the person if we can, and many shake their heads or otherwise communicate no to us when we indicate we would like to take a photograph. I have had other tourists photographing past us while we ask. We respect what people ask - I'd be pretty unhappy having someone come up to me at home or work and try to take my photograph.