I am more curious about what the reply was to the undegrad student and how did they keep him quiet.
According to TFA the undergrad student was a she not a he. From the article:
The BBC aired a special on the Citicorp Center crisis, and one of its viewers was Diane Hartley. It turns out that she was the student in LeMessurier's story. She never spoke with LeMessurier; rather, she spoke with one of his junior staffers.
Hartley didn't know that her inquiry about how the building deals with quartering winds led to any action on LeMessurier's part. It was only after seeing the documentary that she began to learn about the impact that her undergraduate thesis had on the fate of Manhattan.