As I have said professionally and personally at least five thousand times (and not only drug counselors but the overwhelming number of physicians will agree with me).
While certainly all pot smokers don't become drug addicts, most drug addicts begin their additive habit with pot. So, why take the chance. Oh, in case you think I'm not and contrary to many who use the drug deny it, pot can be very addictive. Proven fact.
Personally, I don't care one way or another except that the increase in intoxicated drivers would be nothing short of astronomical simply because many don't believe that pot alters their behavior and their reflexes to such an extent (but don't drink that much if at all because they worry about DUI/DWI). Problem is that such an assumption also is completely false.
NCL Epic 2012, Eastern Caribbean
Explorer of the Seas 2009, Eastern Caribbean
Explorer of the Seas 2007, Eastern Caribbean
Explorer of the Seas 2006, Eastern Caribbean