Being a graduate of FLETC, I can tell you first hand that they have a very informative, if out-dated course on "Dangerous Motorcycle Gangs"!
Bottom line is as long as there are people who want to get high, there will be people out there to make it available to them. Demand requires supply, and in this world of ME ME ME ME ME, well it isn't hard to figure out that someone wanting more jingle in their pocket will be more than happy to grow, transport or sell the substance required for said high!
Mike :alky