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Stranger kidnapping is an extreme black swan, but there’s plenty of more realistic scenarios where tracking could mitigate a bad outcome. Kid gets off the school bus at the wrong stop: found in minutes. Kid is riding bike, falls and knocked out: found easily.

There’s a ton of rare, negative scenarios where risk reduction is so cheap and easy that you’re silly not to do it. Car accident deaths are about 1 in 100 million miles driven, you certainly can’t control other drivers, but not putting on a seatbelt is stupid.

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> Kid gets off the school bus at the wrong stop: found in minutes.

if they have a phone they can call for help. before mobile phones they used payphones.

> Kid is riding bike, falls and knocked out:

Unless its somewhere very lonely, someone sees the kid, calls emergency services, who contact the parent. I do not know how this works in the US where you pay for ambulances though.

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It's the same. Ambulance gets billed to insurance, if they don't have insurance then it's written off (actually just everyone else pays more).
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That is true.
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