There was a boy tending the sheep who would continually go up to the embankment and shout, 'Help, there's a wolf!' The farmers would all come running only to find out that what the boy said was not true. Then one day there really was a wolf but when the boy shouted, they didn't believe him and no one came to his aid. The whole flock was eaten by the wolf. [Aesop's Fables. A new translation by Laura Gibbs. Oxford University Press (World's Classics): Oxford, 2002.]
Fear seems to be an abundant and inevitable product of the democratic state. I have commented earlier that this means that, if its leaders have their way, its citizens will live in a permanent state of being more or less scared out of their wits.
I now realize that there is also a down side if they don't have their way, and people just stop believing what they are told. There is a legitimate role for alarms and warnings, if they are overused they will cease to work.
Update: On the crying wolf theme, see the last paragraph of this.
But maybe the best comment is this.