These over reactions will continue and the numbers will likely escalate.
To a government official, the potential fallout from being notified of a possible threat, not reacting and the threat turning out to be real, is loss of job. The hounding media will see to that. Alternatively, the potential fallout from being notified of a possible threat, over reacting, and the threat turning out to be a false alarm, is nothing more than criticism on sites like DP.
My theory is that this phenomenon results from the world getting smaller due to the proliferation of information and the cable news channels having to fill time 24/7. They land and focus on violent events and stay there until something else more important captures their attention. Viewers just follow along, working themselves up until they're fearful of their own shadows.
This is one reason why it's important to keep the boob tube turned off as much as possible if you want to stay sane. Most people don't, of course, which is why the world is increasingly insane.
Never trouble trouble til trouble troubles you. Fortune Cookie