Quoting Emperor_Nero, reply 1
Do you know how many people are killed by the drug cartels every year in Mexico and South America? What about all of the drug related murders?
Decriminalize narcotics, and all of the above is gone.
Then how do you decide who gets to use them after you decriminalize them? The war on drugs is a waste of money, but just throwing dangerous compounds at people to use at will isn't a good solution. What is your solution that prevents having a subset of society on highly addictive substances that all have extremely negative side effects?
Edit: I am for the legalization of marijuana.