I had an interesting response, yesterday. The gate was wide open, with a clear view of the new building. As I pulled out my camera, a female employee slammed the gate shut with "Put the camera away, this is a closed site, meaning no pictures". I said, " But I've taken several pictures through the knot hole, without any complaints". Her sarcastic response was, "Yea, good luck with that..."
I can say that after 30 years of visiting the city, this was my first hateful employee I've met! Thankfully I had a great time the rest of the day...