I think its good. I like it.
There is no truth in his photography that is its not going to be used for evidence on court and all that...
He creates a reality of his own.
Personal experience:
Its difficult to do what he does especially if you are alone.
Try using a flash at night see how many nosey parkers you invite and adds their little bit of thought/threat in what you should or should not photograph.
I'm not saying I'm am right. I am taking pictures in the grey area especially in singapore where public is not used to it.
Well I kill my child yesterday when i was pressured into deleting my picture.
On the otherhand this seems to be good ground for practice if i ever want to be a war photographer.