No reason to argue about stopping at a stop light or not either. You can always learn the hard way. I saw it last season in the mountains. A nice fellow had come all the way from Belgium and carried a big pack for three weeks with about 20K of pro digital camera gear in it. Latest and greatest lenses, carefully protected with cheap fogged-up filters. The end result: he would have gotten sharper pictures using a five dollar disposable cardboard camera.