Wow, yeah, you have to be careful when dealing with issues like that. If I may, I would suggest not filming and antagonizing the cops, they can really go against you if you don't pay them the proper respect. In a situation like that, you might want to tip your hat to the kids and wander away well before asking the children where the parents are. I think we have all dealt with things like that. When I first moved to my current address, when my 9 year old daughter would come over for the weekends, a couple of kids about the same age from down the block would come over to play. One a boy, one a girl. At first, I would be pleasant and let them play in the front yard while I sat in a lawn chair and read. "Where do you live?" "Oh, a few houses down". "What's your mother's name? Does she know where you are?" "She lets us play with neighbors..." Yeah, very hard to believe a woman would allow her children to go off and about like that, hell, she didn't know me.
They would be in my front yard for hours.
After a couple visits, they would want to enter the house (for water, bathroom, etc). I was not comfortable with that, but had a hard time being rude/paranoid/unneighborly. Damn, they're just kids, right? Can't kids play and enjoy their youth with friends? But after I guess the fourth visit, I decided this was a bad idea. From then on, when they would come to the door, I would make an excuse and send them on. My daughter had plenty of friends in girl scouts and at school. If the parents were not doing a better job than that, I did not want to be involved with any of them.