<human>: I have a 7 year old, and we live on an Air Force base. She is friends with the little girls next door and across the streets, and they all play together.  It varies from under the houses (open carport like area) and in front of the house at the play ground. Her friends are nice little girls, but lately one of their things they like to do is play in and on vehicles. 

Yesterday, I came downstairs so we could go to the store, and 3 little girls piled out of the cab of our pickup, which is a manual. I asked them not to play in or on our vehicles and then explained to my daughter why I didn't want them to (Even showed her that if they accidentally pull the e-brake the truck rolls backwards).  After we got home, she went to play again, and I look out and they are on the roof of the van across the street, at the girls house. I told my daughter that she needed to come inside, and told her I didn't want her playing on other peoples cars either, because it's dangerous. 

Today, she's out playing again, and I go out and spot her on their van again, and hear "Oh no! Get down! My mom can see us!". My daughter is now grounded from going out to play with her friends.

My question is, do I talk to the girls parents? I've never met them. It seems like the girls are pretty much sent out side when they get up and let play outside all day. I don't see their parents check on them (the girls are 5 and 8). I don't know if I'm over stepping my bounds, or if I should just suck it up and let them know their kids are doing something that could get them (or someone else) hurt?

Can you provide a brief overview of the text?
<bot>: My daughter (7yo) and her friends(5yo & 8yo) keep playing on/in vehicles, do I talk to the kids parents?