I used to do that. It gets old really fast. If you want to make a left-hand turn, you have to bike over to the crosswalk, press the button, wait thirty seconds for the light to change, walk across, (another thirty seconds on a wide street), press the crosswalk button again, wait another thirty seconds, walk across the street again (another thirty seconds). If you have a few red lights on your way home that can easily add ten minutes to your travel time. At a certain point common sense trumps obeying every technicality of the law.