I shudder every time I see a thread related to this topic (child protective services making insane decisions with no oversight, because the law is vague enough to let them do so).
It's not just the vagueness of the law, it's a system and culture in which pursuing a bullshit claim draws no punishment, but ignoring a claim that a reasonable person would judge to be bullshit and turning out to be wrong may ruin your life.
I feel that with the burgeoning politicization of this function (consider their role in anti-transgender laws) things can go in a very dark direction very fast.
As I understand it, not only is the law vague, but also CPS is underfunded. Which of course, you need funding for program oversight.
Well, no surprise it's underfunded if it has to investigate literally every third kid (https://news.ycombinator.com/item?id=34916782) - if they tightened up the criteria so that CPS would ignore at least half of this unreasonable number of cases, then they might have enough funding; they seem to be doing so much work that shouldn't be done at all.
I think we should vocalize the concept of "negative work" more often. That being work with which society as a whole would be better off if left undone.