That's the dangerous part, how do you know if the "kid" is armed? Do you really want to give them the benefit of the doubt and then eat a bullet?
I had 2 punks, around age 14-17 kick my front door as a prank. I went outside with my gun looking for them, but they had disappeared. I think they were hiding nearby and saw I meant business, since I haven't seen them around my house the past few months since then. From the size of them they looked like full grown adults, but we've seen them around the neighborhood before and they are teens. I think I posted about it in the bitching thread, but if I had seen them that night, they'd be two dead "kids".