Indeed... If the goal is to protect us from bad guys it would be. Indeed, every attack so far the people have been known ahead of time, but they lacked the physical man power to do anything. They have also presented no evidence for the plots they supposedly did stop. I suspect this is all about instilling a sense of fear and compliance in us.
The irony being that this is just about the worst intelligence gathering strategy imaginable. If you just trawl everything and see what turns up you're going to drown in a sea of irrelevant date and will almost certainly miss anything that might have been useful, however you define 'useful'.