Interesting chat about ethics.
Do you believe all government,and private organizations that photograph you without your permission are unethical? I live in an urban/suburban environment and when I leave home I'm photographed hundreds of times. Every intersection and many commercial establishments of all types record my image when I would prefer they don't.
I rarely ask for permission. When I do I tend to pose the subject(s). I foillow the laws on privacy and I think if I act within the law I am ethical. At the same time there are subjects I have no interest in photographing (obese, handicapped, homeless, injured, sad). Of course I others have a completely different code of personal ethics and obviously they will behave accordingly.
Then there's the Winogrand method. If the camera is discreet and the photographer is fast, the subject has no idea they are being photographed until it's over. Being fast doesn't mean you can focus quickly, it means you can create an interesting composition in an instant. The X-Pro 1 will be a discrete platform. I think the original post comparing it to a large DSLR was refering to the Winogrand approach.