I call B.S.
There is no way that some random person can trace a connection through Xbox and get a physical address. I can almost guarantee that this kid either gave his address or it was an acquaintance that placed the call.
Hell.... I wish I COULD trace an IP like that. I would love to show up at some of these little kids house and see if they talk to a full grown man standing face to face with them the way they talk in the lobby. A guarantee they would sing a different tune.