David, doesn't matter the venue....they're all "copy cats".They're all targeting soft targets and want to be martyrs. The media is playing right into their hands.I think there is some potential to this idea also. However, there really hasn't been much "copy cat" events. Yes, there has been many at schools, but also theaters, outdoor concerts, walmarts, grocery stores, parades, etc.
There will not be a single answer to make this stop.