I'm outraged we don't have a policeman at every daycare center to prevent abuse and possible kidnappings. Who cares if it'll make daycare so expensive that people can't afford to put their kids there.
In fact, if we had a fully equiped riot squad in every school, the Columbine murders wouldn't have taken place. Let's do that too.
Oh, and don't forget that fully equiped medical station along every mile of every highway to help in case of auto accidents.
And I hear that the presidential limo can survive punctured tires, machine gun bullets through the gas tank, crashes at up to 90mph, not to mention a grenade. In the interests of safety, let's require all automobiles to share that safety standard. If you can't afford it, then don't drive.
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The downside to positive match plus hand search for every single bag is not embarassment, it's the fact it'd paralyze air travel by making it slow and expensive, just like all those *safety* suggestions above.