AlsoSulfate, you wouldn't believe how much I want to help you with this right now.
All I could say is, get about 4-5 friends to walk around the neighborhood. They should act very naturally when the kids are creeping up to your house. Then, when the kids ring the bell and slam the door, your friends can sprint and beat them up or something. Do you have a veranda? It's a nice idea to station a sniper buddy with an airsoft barrett 50 cal or something ;)