The comments about the futility of security checks for flight crew miss the point slightly. Of course no pilot needs exploding toothpaste or incendiary lipstick to become a "martyr", but when flight crew and passengers can mingle freely after going through security, as they can at most airports, there can be no argument for not subjecting flight crew to the same controls as passengers.
What matters is that those security controls should be appropriate and consistent. They should also logically take place immediately prior to the passengers boarding the aircraft, in which case controls of flight crew would indeed be superfluous.