I'm sure there are others who will share your misconception here. I'm surprised that with a law enforcement background, though, you dont have a diferent view. Most LEOs I know are all about legalization. They dont have problems (at work) with people who use marijuana. There arent people smoking too much weed and driving their cars 90mph into oncoming traffic. Nobody is getting too high on pot and beating their wives or children.
As far as your concern for a mechanic under the influence (or any professional, for that
er), you should be every bit, if not moreso, concerned about a boozer or a dope fiend swinging the wrenches under your hood.
Nothing is going to change about Colorado aside from its tax base.