California gun laws aside...These MJ farms are probably going to require an army of security forces, sensors, cctv... and it is a sure cash money bet that there WILL be shoot outs.
So why hasn't that happened in CO and WA?
Not only that, Marijuana businesses cannot use banks. Everything, including taxes, is paid in cash.
Look for the Cartels to be heavily involved in it.
Dealers in tobacco and alcohol don't engage in violence, because their products are legal - and so legitimate businessmen are able to enter the markets and outcompete criminals, and because nonviolent means of conflict resolution are therefore available.
It's not the substance that leads to violence, but the illegality. (Alcohol dealers were violent when that drug was illegal.)