Elisabeth Britt dissects the dysfunctional laws surrounding legal drugs, marijuana and guns.  The federales are going nuts because they cannot stop people from enjoying a toke now and then.  The law she dissects uses the term "addicted" to describe anyone who even smokes once.  And ...  too much for here.  You want to read her article.  Britt lays it all out is a short pithy post.  

Check out "Should the City of Bellingham issue concealed weapon permits to; or, allow individuals to own or possess firearms and ammunition who are addicted to mind-altering drugs?" on the Latte Republic, her blog.