This November, several states will vote on whether to legalize marijuana for recreational use, and the proponents of legalization have seized on a seemingly clever argument: marijuana is safer than alcohol.  The Campaign to Regulate Marijuana Like Alcohol, an effort of the Marijuana Policy Project (or MPP), has taken this argument across the country.  Their latest strategy is labeled Marijuana vs. Alcohol.  It is a very misleading, even dangerous, message, based on bad social science and sophistic public deception.