How is accusing them of negligence going to generate more evidence against you? If no-one stands up to this organization this sort of thing is going to continue to happen.
Even worse, they can bring your children to psychologists and ask them leading questions that could lead to concerns about anything they like. DCFS can make your life a living hell if they like. And the more you piss them off the more they are likely to do just that.
I'm curious about this. In the original article, the writer mentions insisting that the interviews be recorded (and even then, they weren't).
Would you get in trouble via wiretap laws if you bugged your child during these interviews to hold a recording as evidence in the event leading questions are asked?
So it doesn't mean that you shouldn't stand up, pick your battles literally means that you decide on the battleground and make sure they can't get back at you in some sneaky way that will upset your life in ways that you probably really wouldn't care about. See some of the other stories in this thread about how those things go.