Generic warnings are unfortunately a response to the attacks because it helps demonstrate some form of action before any attack. People said "We Were Not Warned" and the government gives them an alarm system, its pure beurocracy that nobody gives a fuck about. It doesnt create a culture of fear, people tune out and ignore it and then they will be shocked the next time an atrocity happens. I simply do not buy this culture of fear hypothesis, it takes a real and tangiable threat to create that permanent cycle. You say culture of fear think like USA, I say no way think like USSR. Living in free and open societies means that people will distract themselves with their own live oblivious to any possible dangers.