Err, you do. Pilots and air hostesses have to get through customs the same way everyone else does. Sure, they have a faster queue, but they still have to go through customs checks.

Not only that, but they have to man the desks until all the luggage is check in, close the desks, then go through customs. The same staff at a lot of airports do the baggage, then the gate window, then fly. This is why you have that 3 hour window from checkin to boarding.