Another example that just sprang to mind. A headteacher I know reported safeguarding concerns when he was made aware that a 7 year old was walking to primary school alone. I suppose partly to do with leaving a paper trail in case the worst should happen - but the system then does kick in all the same. It's the same law that was originally designed to deal with far more serious incidents. (You could argue that this case wouldn't even qualify in many peoples' minds, but it's also not obvious to me that the headteacher was being irrational, given the law.)