There is always going to be growing pains, but as we've seen now, Marijuana is 'safe', much safer than alcohol and tobacco and OTC drugs. It's about legalizing it, regulating it, and taxing it. Think about how many lives have been ruined because they were arrested with possession of Marijuana? All those teens and people charged with essentially a victimless crime.
Think about the impact of alcohol on crime. How many assaults, public intoxication, drunk driving deaths, murders, wife beatings and spousal abuse that alcohol has contributed to? How many cases of FASD in infants, how many cases of liver cirrhosis etc.
Legalizing Marijuana allows law abiding citizens to purchase it legally, it contributes tax money to the state and municipal economies, keeps citizens out of jail, allows for an in-state boost to jobs and production, and removes profits from organized crime and drug dealers.
I've never done Marijuana, I'll never do it because I don't see the need to. But I am VEHEMENTLY FOR LEGALIZATION of it nationwide, in Canada and the US.