Devin the people will be finding many ways to get their drugs like they do already because it is illegal which being a rebel is fun. as the saying goes if someone were to jump off a bridge would you do it.
Your darn right that the mafia will come in. The mafia will have to control the Marijuana chaos. The Mafia will try to get all the Marijuana to themselves.
Yes boats were great because the supplies got across to other countries and send troops to fight instead hanging around and shooting the people who invade.