As has been pointed out before smokeign marijuana is a choice. Now how good or bad that choice is it is a choice.
Smoking is a choice, (regular tobacco I mean) and not a very good one, but thousands of people do it anyway.
Drinking is a choice, slightly better for you than smoking, but not by much, and thousands of people do it anyway....So while smoking weed is a choice, that is a choice that people are alound to make, not some goverment organization. Such is somewhat the principle of America.