I do think of this subject objectively.  That's why I always look for exits when I walk into a restaurant, movie theater, etc.  I never know when a fire might break out.  When I walk down the street or if I'm in a crowded area, I look for avenues of escape in case a person driving a truck is planning a mass murder using a vehicle.  Each time I fly, I hope the TSA is thorough.   Do I think about a mad man with a gun?  Of course.  But objectively, I should be concerned about fire, trucks and bombs just as much, if my take on the news is right.