Of course, if the terrorists start hitting real targets instead of taking out any number of men/women/children who just happened to be passing by at the time it would concentrate the tiny minds of those in power in no uncertain terms.
For example, you've no idea how easy it would be to take out the oil refineries in my neck of the woods. The "security" is a standing joke. If the rascals got several oil refineries/tank farms in one go the price at the pumps would rocket with the subsequent knock-on effect on inflation and the wider economy rippling through the country like a shock wave.
The ungreat and ungood would sit up and take notice THAT day.