OnlyTheTruth: You may be right that it isn’t the greatest concern, but it isn’t a minor concern, either. And a single smoke detector will not help in a large building. You need many of them, one at regular intervals.
There is an appalling lack of interest in smoke detectors in residential buildings as well. I have put some up in the stairwell in my building, but I have never seen any of these in any residential building I have visited.
In the UK, the fire department will install these for free. They should do the same here in Israel.