Except a random stranger won't point a sack of weed at you and you'll fall over dead. Death by self-stupidity is one thing. Death by the stupidity and anger of others is quite another.
driving drunk kills even more people. pointing a 3000 pound car at someone doing 60 mph is just as deadly as a semi-automatic Glock. and driving under the influence of drugs can do the same.
Not to mention driving while talking on the cell phone, which has a similar accident rate.