First off.... Relax..
Second.... That sucks that you wasted a hunt with your daughter. Go talk to the "kids"..... Work it out. Your willingness to approach them on the situation may discourage them from doing it again in the future. Obviously, you can't force them to stop them from shooting clay pigeons on their property.... But you can let them know that you don't like it.
Lastly, there's no such thing as a "wasted" hunt with your daughter. Great job on getting her involved!
I can only hope that if I have a daughter some day that she will want to hunt with me. Don't lose sight of what matters.
Again, nice job on a great hunt.