I don't like it, and I don't agree with it, but I acknowledge that if a 2nd 9/11 level event were to occur after the government relented and imposed reasonable limitations on data collection that the party out of power at the time could easily scream bloody murder and take all 3 branches of government in a single election cycle. I'd previously only expected this from the party of Kang, but Obama's stance on drones and NSA surveillance has revealed the party of Kodos is no better.
Which is to say I think the surveillance state is a symptom more than the disease. America has lost all sense of perspective.
~30,000 automotive deaths (of which ~10,000 resulted from drunk driving) annually.
~11,000 gun deaths.
~6,000 deaths from falling off ladders.
~3,000 people died on 9/11.
Ergo we should ban ladders, guns, alcohol, and cars: it's the only way to be sure, no?