Stupid Maid

No, it is not my maid's story, I don't even have a maid. But, it is my neighbour's. Everytime I went to the playground, I always saw these 3 little kids playing together without an adult supervision. I know it is safe in our house area, but still if any incident happen, who knows right? 

First time I saw them playing, their maid was there together with them. But, what she did was just sitting and didn't monitor the kids at all. Until the boy fell on a rock and got hurt on his knee. You know what she did? She scolded him out loud to that kid and slapped a bit on his butt and leg.  I was so damn shocked coz she even didn't bother I was there looking at her fiercely. And the other two girls were playing small rocks and got themselves dirty, and she also slapped them as well. She asked them to go home and scolding them all the way. She even pull the youngest's arm so harsh. 

The second time I saw them was few days back. As usual, there were only the kids playing together. Suddenly, the maid came from far shouting at them, asking them who let them go out from the house. I was like, WHAT?? You don't even notice that the kids went out on their own. Can you see how ignorance the maid was?? She scolded all of them, the other two (older sista and bro) ran immediately once they heard the maid's voice. But the little one was so damn scared and crying out loud calling his brother and sister. Once the maid besides her, she pull the kid's ear and drag her back to their house. I felt like wanna scold that damn maid, but I don't know why I didn't do that.

I don't know which house they were living. But, I was a bit concerned coz if she can do it in front of other people like that, she might can even do worse at home. And I can see that the kids were so damn scared, that was why there were running away. I don't know whether I should tell their parents or not coz it was weekend. I wonder why their parents not at home. What should I do??