I think I know why this happening.
the kids are confused. I think you are the victim of mistaken identity. They more than likely came running up to the truck to play on the jungle gym. Than they found out is was really a HUMMER. As for the poop, well, I'm not quite sure. That is pretty fawkin gross. Did they have corn the day before?
You are the neighborhood watchdog! Get crackin with those motion activated cams.