In fact the boys were playing with their airsoft guns while waiting for the school bus to arrive.
Their parents and their parents' attorneys would disagree with this - or should disagree.
One waits for the school bus at a school bus stop.
These urchin future killer mercenaries were playing in their yard before it came time to move to the school bus stop.
Schools have extended their reach over children to now include what happens at school bus stops, which may be acceptable depending on the specific activities they are seeking to control. But to try and extend their reach to include what a child does between crossing the threshold of their home and arriving at the school bus stop is over-reaching. In my neighborhood the school bus stops are at designated locations - often at the end of the driveway of a single-family home or apartment complex. In the mornings I see mothers supervising children at play back from the school bus stop - probably mostly to keep them from darting out into the street in front of traffic as opposed to umpireing hopscotch and jumprope and various ball games. While 12-year olds do not need the close supervision that 6-year olds may require I am fairly sure there is some form of parental supervision in action.
If it were my kid my attorney would be filing civil suits for all sorts of violations of privacy, interfering with parental right, and loss of consortium.
stay safe.