tissue boxes in the back window

Random observation:  People put tissue boxes on the shelf behind the back seat in their cars.  I'm not sure of a much more useless place to put something like that.  If you're driving down the road and have to sneeze, do these people really pull over?  And then do they get out of the car, open the back door, lean way in and pluck a tissue?  or do they crawl through the middle to grab one?  or (and I hope this is the way) do they slam on the brakes, causing the tissue to become a missle and then the catch it mid-air?  It would seem to me that it would make more sense to have it in an easily accessable location to catch the snot rocket or whathaveyou before it becomes a smear on the window/steering wheel/pants/sleeve.