Some interesting facts on marijuana, from the Scientology drug information web site:

Sixty percent of teenagers in drug treatment programs are there because of marijuana. According to a National Household Survey on Drug Abuse, kids who frequently use marijuana are almost four times more likely to act violently or damage property. They are five times more likely to steal than those who do not use the drug.

Marijuana is often more potent today than it used to be. Growing techniques and selective use of seeds have produced a more powerful drug. Correspondingly, there has been a sharp increase in the number of marijuana-related emergency room visits by young pot smokers.

Because a tolerance builds up, marijuana can lead users to consume stronger drugs to achieve the same high. When the effects start to wear off, the person may turn to more potent drugs to rid himself of the unwanted conditions that prompted him to take marijuana in the first place.
Marijuana itself does not lead the person to the other drugs: people take drugs to get rid of unwanted situations or feelings. The drug (marijuana) masks the problem for a time (while the user is high). When the“high fades, the problem, unwanted condition or situation returns more intensely than before. The user may then turn to stronger drugs since marijuana no longer “works.” >>

Scientology churches and missions have been active in helping people with drug problems since the mid-1960's and there have been Scientology anti-drug programs for the past 20 years.

I'm personally committed to helping kids steer clear of drugs.