... not to forget the crowds of friends and familiy hanging around outside with little fare well ceremonies going on.
You can exit if someone from the airline you are flying on takes you to the CISF supervisor and documents you have to leave for a reason.
Good luck find someone from AC to do this for you
PS: there is an elevator/lift that goes down to arrivals (and up to the airline offices) right opposite the lines for immigration in T2B. There is a guard there, but you never know.