I'm actually going to respond to this here because I think it's important to know the how/why behind things like this. CPS shouldn't be demonized for actions of some people. I do think some changes need to be made, but how to effect those changes is a whole different question, because ultimately, we have to protect children.
In my case, my ex decided to use CPS as a weapon. He was angry that I had made the decision not to be in an unhealthy dynamic and that I wouldn't allow my daughter to grow up witnessing those behaviors. I do not know every complaint he lodged, I know some of it, but the initial complaint was never something I could actually see. Knowing my ex as I do, I'm sure that whatever he created was enough to scare anyone who cares about kids. I suspect that- at many levels, she really just wanted to make sure my daughter was safe, and her initial response was to err on the side of caution. She was unbalanced enough to take that too deeply into herself, and in that, I'm sure she thought she was protecting DD by creating a situation that meant she needed to be removed.
The first thing I knew of the complaint was this woman on my doorstep at about 8am while we were still in our pajamas. She was very much over the top from the get go, alternatively commenting on how pretty DD was and how well behaved, and in another moment attacking me and making odd accusations (she also claimed I appeared drug affected.) I let that initial comment slip past thinking, I probably did look out of it since I was JUST getting over a horrible flu. As I noticed how incredibly invasive she was, I knew there was something very wrong. When she started taking staged pictures I knew I needed immediate help. I had always been a very pro-cps, sure let them in and look around! sort of person. It snowballed very quickly, and sadly, whether for the right reasons or the wrong reasons, this woman had come in with her mind already made up that my DD was going to be removed.
She was irate when I contacted the police, and became quite angry with them when they tried to speak up on my behalf stating that they clearly didn't know what to look for. It was an unfortunate system, but in hindsight, I will say that with a great deal of luck, and because I had enough experience to know what was wrong with the whole situation, I was able to untangle the mess and DD is with me. Her father did eventually terminate his rights, but I had been granted sole physical/legal custody long before that happened. I worry about what would have happened if I had not been able to advocate for myself, or if I had not known how family courts work, had this woman's word been taken at face value, it would have been a terrible outcome for my daughter. It is because of the possibility of abuse that I think the system does need some change, but I realize that it is very rare for a child to be removed without cause, and even more uncommon for reunification not to be attempted if they are. I'm not sure you can design a system to be foolproof- certainly in my situation had a couple worker been present instead of one it would have helped. However, where does the money and the staffing for that to happen come from, more importantly, while two people are investigating me and protecting me from a situation like this, who is investigating cases where kids really are in danger?