"If we made it our policy not to search 90-year-olds anymore" Even if that isn't the optimal policy (and I didn't suggest that it was) due to its exploitabilit

"If we made it our policy not to search 90-year-olds anymore" Even if that isn't the optimal policy (and I didn't suggest that it was) due to its exploitability, it doesn't then follow that having the same search probability for 90 year old women and 21 year old men is optimal. Perhaps searching young men with a 3x higher probability compared to old women is optimal. What we can say with confidence, when considering only the immediate objective of flight safety (or venue security), is that an exactly equal search probability is definitely not optimal, due to nearly all instances of lone shooters and so on being young or middle aged men.