It does look at bit suspicious. It's like they created a situation that would allow them to have a reason to be looking towards your house. They weren't even talking to each other. They were just staring.
I'd keep an eye on the situation.
Before my Dad's quad was stolen from the backyard we'd noticed small things out of place, like sticks we propped up were knocked over. It was about a month prior to the plan they were doing that.
After that happened we installed cctv cameras and noticed different people from the same group would come back at night time looking for a replacement quad. It was always about 11pm. I was still up and sometimes one would jump over the fence. I'd flash the lights on my car that was right next to the guy inside the yard.
You think 2 miles is gona stop that kid!This is why you have your house at the end of a two-mile private drive. Commoners.
TrespassIt's this sort of behaviour that really annoys me. Let's assume it's innocent. Why would any parent believe it's acceptable for their "little darlings" to trespass on someone else's property? Basically, you are telling the kid that it has a right to go where it wants.
Trespass
When they enacted their plan they removed the back fence panels to get the quad out. We called the police. No one came out. We stopped the local pcso to come and look. They asked the police to come out but they refused.Did you go to the police or have a welcome prepared one night?
If you don't want people walking on, you'll need to remove public access more clearly.