What when ISIS figure out this is the easiest way to terrorize people in US? What are we going to do then? Luckily the ISIS followers are not so smart... But N

What when ISIS figure out this is the easiest way to terrorize people in US? What are we going to do then? Luckily the ISIS followers are not so smart... But North Korean intelligence might pull something like this on a much larger scale. And target specific individuals.