Wouldn't mind if I was told if IABU... but inspired by a recent thread. I came back from taking my DC's to one of their swimming lessons. When we came out of the centre, I saw a boy, who looked like he was around 4..no more than 5, climbing around on the roof of his mothers car. He would be climbing over, on top of the engine, and standing up on the roof (whilst the mother was inside her car chatting on the phone). I gave her one stern look and I said "he shouldn't be on there, it's dangerous). I then told the young boy ('get down! You will hurt yourself'). He obviously looked at me bewildered but obviously didn't come down from the car. The mother just gave me one dirty look and I just walked off..
I don't tend to open my mouth in public or cause scenes. I'm going through too much to worry what strangers are doing but I was just shocked at this or am I just being precious?