1. In the U.S., only ~10% of boarding passengers are extensively patted down/searched at the gate; and
2. these passengers are a combination of random selections and those who a)bought one way tickets and b)bought tickets that day; and
3. deadheading pilots always meet criterion a, above, and always are searched; THEREFORE:
4. Security spends time screening the very people least likely to commit violence, THEREBY NOT SCREENING a randomly selected passenger that may be a terrorist.
QED. Back to your meals.