Excellent pictures David, thanks for keeping us informed. I'll be in New York next May so at least I come prepared to meet with some agro.
We in the UK are beginning to have similar problems in making photographs in public transport areas. I did my usual street photography workshop in Brighton in August and was stopped photographing in Brighton Railway station by the British Transport Police on the grounds that the group I was leading could have been photographing the station for terrorist purposes. There were 17 of us carrying about £60,000 worth of Nikon and Canon equipment and when I suggested to the police seargent that had I been a terrorist I would not have come mob handed but would probably have used my mobile phone camera to get the info she just about went balistic with me.