If we let you photograph those flowers, the terrorists have won

Last summer I was taking pictures of the some bronze sculptures on an office building downtown. The Security Guy came out and asked me to stop. I asked why, I was on a sidewalk and there was nothing nefarious about taking a picture of something in plain view. He said "You never know". I pressed him and said "know what"? I explained that it was pretty obvious what I was doing and if he really thought I was a threat he could call a real cop since I wasnt trespassing. He went back inside and I walked away, such a paranoid and silly world sometimes.