The event that made me most scared to leave the house is still the Steve Stephenson killing... some sick people are going to kill total strangers for very sick, personally unwell reasons, or even just complete idiots trying to turn it into some kind of spectacle now with modern media.
I know this may be slightly off topic given the content of the actual article you posted since it isn't the same kind of terror, but it's just what left me slightly more afraid to live my life this last month!