A very insightful talk!
"FireShonks 2023 - Chat Control: Mass Screenings, Massive Dangers"
https://www.youtube.com/watch?v=z-Gi5mEFSq8
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I knew about the problem of trying to detect something that has low prevalence. The number of false-positives may vastly out number the true-positives.
*But I had *not* put together...
(Sigh...)
But I had put together how many real world systems are examples of the same thing: mass screening for low prevalence problems.
And how the different situations make it either a good or bad idea.