Think of it this way. Does 'Weed' safe more lives legalized, Or illegalized. If its legal you get a large influence on the 14 - 20 year-old age group that its cool. People just want to fuck around and smoke one, Maby there just curious, It is alot easier to obtain. And increases the 17 < population of immature sex. You get people using this drug mainly for sexual purposes and waking up not know what had happend. Grades drop, And people have to deal with what they have done stupid and life changing events.
Legalizing this drug will make a teen age-group as curious of what it is like to be 'high', go to a store and buy it. If illegal, do you think they will take the time to find an illegal market just to buy a drug. Legalized 'weed' could bring the drug into schools, in wich there is not just 'smokers' in the 'smoker pit'.