If marijuana legalization sends the wrong message to teenagers, why aren't they listening?

Forbes (US)
Wednesday, December 18, 2013

smoking-cannabisProhibitionists warn that it’s dangerous even to discuss legalizing marijuana because such talk sends “the wrong message” to the youth of America, encouraging them to smoke pot. If so, you might expect that the legalization of marijuana in Colorado and Washington, approved by voters more than a year ago, would have a noticeable impact on marijuana use by teenagers. Yet the latest data from the government-sponsored Monitoring the Future Study indicate that teenagers continued smoking pot at pretty much the same rates as before.