Drugs and security in North America: Mexican waves, Californian cool

I tried to have a little class debate on this topic, but I felt my class wasn't overwhelmingly enthusiastic about it. Perhaps because they are scared to express their opinion, or perhaps because they don't have one (something I have a hard time believing). I'm trying to provoke them one last time with this article from The Economist:
Three things to stop the gangs: better police in Mexico, stricter gun laws in America and legal pot in California.