I think the big issue with these type of attacks is how everyone goes into that "We need to do something!" mode, including the government. At the end of the day, it leads to less freedom and liberties and more government control.
Just look at how screwed up everything is since 9/11, with all the mass surveillance and customs searches and crap that goes on now, and that stuff is only getting worse. Now they are demanding your phone passwords and search all your devices, at what point are they also going to ask for your social media, email and other passwords too?