I genuinely do not know the answer. But also, what would you define as false positive?
It's blurry definitions all the way down, and that's part of the reason politics doesn't like this problem and would rather argue technology and punishment after-the-fact than actual protection / prevention.
Nuance is expensive and doesn't play well to the crowd.
If I take a picture of my adorable toddler playing naked in a sprinkler in the backyard and CPS calls that child porn and takes him away from me, that's a false positive.
I don't know much about abusers, but my hunch is that they know they are abusers and will more-or-less accept being caught. But what I know about non-abusive parents is if you take their kids away, it's war.
1. I thought you were referring to false positives as a result of my favoring funding of existing Child Services working from mandatory reporting from local relevant professions.
2. My commentary about taking children from parents having its own set of risks was more along the lines of trauma to the child, in that even in if the parent/ child relationship is abusive and harmful, it's such a strong bond that severing it, or restricting it can cause psychological issues.
Totally agree with your commentary above regarding any attempt to remove kids from non-abusive parents. Absolutely scorched earth nuclear war. Also, it would actively be a form of child abuse by introducing unnecessary trauma to the child(ren) and possibly instilling a lifelong suspicion (at best) of authority.
As a result of that train of thought, my answer is: no false positives would be acceptable.
Fundamentally, I'm against personal photos being scanned at all; false positives being one reason, and the broad misapplication of bans by 'big tech' in their implementations of automated systems detecting breaches of policy, and the overall "computer says no" brick wall offered as recourse, being another.
It's blurry definitions all the way down, and that's part of the reason politics doesn't like this problem and would rather argue technology and punishment after-the-fact than actual protection / prevention.
Nuance is expensive and doesn't play well to the crowd.