I hope it doesn't ruin it for the kids. Maybe all they really need is an officer to come down, and speak to them calmly about proper regulations and safety measures/appropriate places to play.
I think their hearts are in the right place, but they lack a little understanding as to how seriously the safety/control measures of airsoft should be taken (they probably equate airsoft to playing "cops and robbers" when they were kids).
I'd like to see a solution that corrects the problem without destroying their fun and stomping all over their enthusiasm.
"World's laziest sniper"