Really? My guess is the government would see the new legal marijuana business as a great source of revenue and eventually tax it in close proximity to the taxes they impose on tobacco.
The illegal cigarette market is a very booming business. Take a little field trip. Go to your local grocery store or convenience store and look at the brands of cigarettes available and notice the prices. Next drive to a local Indian Reservation and go to a smoke shop. Take a look at the brands available and notice the prices. You will notice a whole plethora of brands that are illegal to sell of the reservation at very low prices (because they don’t have to charge taxes).
How will legalized marijuana be any different?