I have clients (I'm a meditation teacher) who are on both sides. Some work for child protective services and others have been visited by them.

It's a vexed issue because within the "mess" there are children who truly are at high risk from their parents. But at the same time CPS can get called for no reason, the wrong reason or even weaponised by an unhappy vindictive party.

In one case the mother had confiscated the teen's phone because he required boundary setting. The teen told a therapist that he was being abused but didn't give the details. The therapist called CPS and they and police turned out. It was resolved quickly but it was a hassle and embarrassing. CPS and the police also turned up at school.

A childhood friend works for CPS in Australia and she regularly deals with children who have drugs in their system and who are physically abused.

Another client of mine had an ex husband who was vindictive and called CPS on her. They came and investigated and caused both the parents trouble.

It's a vexed issue. But I think you are correct in that policing services such as CPS can't necessarily be trusted to do the right thing because they are doing a job in the context of their own difficulties. For example trying to make the job easier for themselves.

So if visited by them I recommend legal protection and to be very aware.

Having said that @hungryhustle I don't believe that they are as you say

They do not want to protect you or your children. They would rather do anything in their own power to hurt you and your family by putting you in legal trouble.

Many if not most do want to protect children and I don't think that most want to hurt you and your family.