When they first tried prohibition the gang wars killed many innocent Americans and that made front page news. In today's modern drug war many more innocent people are being kill across the globe. That doesn't make front page news anywhere in the US. I'm not saying using drugs is not dangerous. The war on drugs makes it even more so.
No, because when you make something legal, expect more people to participate.
Politicians predicted that if they legalized pot in places like Colorado, that would wipe out the illegal sales of pot. Wrong. It's stronger than ever. They thought the same thing when they pushed lotteries across the country; it would stop the mob activity in gambling. Wrong, now the mob uses the states numbers to make their gambling more legitimate. They offer higher payouts and of course, no taxation regardless how much you win.
I don't believe that legalizing something that's so destructive can make things better. I believe that it makes things worse if anything. This very discussion came up today with a coworker of mine. It came up because a school mate of his died from an OD late last week. He's in his later 20's, and claimed that was the sixth classmate that died from an OD since he left school.