1. It illustrates the importance of information security in our daily lives. The get-together was targeted because the woman living upstairs informed her new ex-con boyfriend about it (and helped him buy the gun).
Thanks Bart ... Somehow I missed that in my first read of the story ... but it is a real lesson. Sometimes we can't control information, but often we can. Reducing the information flow reduces the chances that it gets into the wrong hands. Just another example of how an ounce of prevention can be worth more than a pound of cure.