Commenting only on the orginal incident:
In this day and age it is so hard to judge incidents such as the one of a person being asked for identification while phographing within a city. Every day I travel into NYC and somewhere in my mind is always the question of what next?
Maybe it's just working in a target that has made me greatly relax my usually far to the left opinions on personal liberties. I still write my yearly check to the ACLU, but when a policeman steps into my subway car I am happy he or she is there and would at their request be glad to identify myself or submit to a search of the backpack I carry.
Sometimes one must sacrifice person freedom for the greater good.