But what of the teenager, with 1000+ friends on Facebook, who posts that he and his family are going on vacation out-of-state for a week? There are now 1000+ people who know exactly where this teen's house is, and that it will be empty for a week. If the teen posts a lot of pictures, potential thieves are probably aware of what this house has to offer.
There are a lot of bad things that can potentially happen. Of course, this does not mean that we should coerce everyone to delete their social networking accounts. But we should open a dialogue with kids (and parents...and teachers) which logically and rationally looks at what we are putting online, and what the repercussions might be.