It's not just IIM Lucknow; all college place-coms have the same image. Every student spends his or her entire college career hoping to be hired by their dream company. They have all worked extremely hard for many years in order to obtain that prestigious position.
You have the ability to place someone while in college. This is why place-comers are always getting these comments, especially from those who were unplaced, missed their dream placement, were placed in another company while a more preferred company was still hiring, are not on good terms with the place-comers, and so on.
Furthermore, Place-comers place people in one company before moving on to place the remainder in the next. They are responsible for placing everyone/or the majority of people. Nobody notices your efforts, and you only attract hostility. Some people try to become place-comers simply because they want to have the authority to place themselves or their friends.