I received a call back from an NYU spokesperson in regards to my concerns about rat poison where one of the fledglings caught and ate a rat on July 12th. The location is called Sasaki Garden. It's the green space between NYU's Washington Square Village apartment buildings.
The NYU staffer let me know that the rat poison has been abated since baby Hawks are hunting there. I thanked them and added that the adult Red-tailed Hawks happen to live and hunt in the area year-round. They said they would look into that and get back to me on any update they may make in regards to their baiting policy.
This is great news and I am glad that NYU was so responsive and took these measures to protect the Hawks!