That's a fairly good argument. I would like to see some actual statistics the frequency of CPS overreacting in an unreasonable fashion. I certainly read many news stories about it, but that is misleading in exactly the same way as the stories we hear about child abductions.

I do however have some level of knowledge here. I have spoken with people involved in child protection about questions like this. I have been told that if this person saw a parent allowing their 11-year-old child to cross the street to play on a playground unsupervised that they would have to write it up. They backed this up with citations of specific laws (Maryland - which does, indeed, have absurd laws on this subject). So while statistics might convince me that this is an anomaly, I do have personal experience that suggests the CPS risk is real.