Jacqueline Duran, 23, left her sixth floor apartment in Stuyvesant Town one recent April afternoon with her recycled bottles in hand. But as she stepped out of the elevator in the lobby of her building, she was greeted by a handwritten note on the glass garbage disposal room door that read: “College students, you’re the reason why we have bugs and rats. Why don’t you go back to your mommies and daddies in the suburbs.”