I am not a mandatory reporter. I would not participate in it if I was expect to be (huh, I didn't notice would be my new catch phrase).
My issue is not specifically to do with abused kids, it is the whole notion that citizens are supposed to tattle on their neighbors without proof of actual wrong doing on their neighbor's part. It creates a nation of people looking out their windows and calling the authorities every time their neighbor does something they deem suspicious or, even worse, inappropriate. It is done in the name of anti-terror or national security or child protection but it is just the authorities, whom ever the relevant ones are in the scenario, making the citizens into police. They did it in Nazi Germany and the Soviet Union. It takes the form of mandatory reporting, McCarthyism, or the new See Something Say Something program. All of them make someone have to prove their innocence in the face of baseless accusations from fellow citizens and in the United States of America you do not have to prove your innocence. I don't care if the thing you are proving is you don't beat your kids or you aren't a communist.
If you have proof of abuse go to the authorities. Mandatory reporting, like zero tolerance policies, are lazy. Kids get bruises and break bones. No parent should have to prove they aren't beating their child just because every once in a while they have a mark on them.
I worry about me, not everyone around me. I am not the morality police any more than I am the real police. What you do is between yourself and whatever God you report to.
Just my opinion of course.
so you feel no ethical or moral obligation to society?
Of course I do. I feel morally obligated to not commit crimes against other people (including children) and to report crimes I witness. I feel no moral or ethical obligation to report alleged crimes I have not witnessed and no proof even happened. Our nation has had enough witch hunts and I'm not contributing to any more.
A number would, but for me to see a child enough to actually recognize most of the things listed, I would have to have a relationship with said child. Since I am friends or relatives with every child that meets that criteria, I would almost certainly take it to their parents first. Now, if I didn't get a satisfactory answer, you bet I would call the police, but I know these kids and their families. It wouldn't be a CYA call, it would be a last ditch effort to protect a child that really needs it.
Read the list. How would I know if a bruise was "unexplained"? How would I become aware of a sleeping disorder? They ask you to recognize things that one simply could not without some sort of relationship or special training.
That is why I believe that people should, by and large, mind their own business. How can a stranger see these things in a child that they see on the playground one time? There are many reasonable explanations for every one of those things without context.

, especially the bolded. I too would get much more involved with the children of family and friends. I feel a different burden to them than I do to other fellow citizens. I expect strangers also to feel less of a burden towards them than I do.