This is the issue. 
We need to focus on the gangs and going hard after them. 
This was why I was opposed to allowing LOTS of home grow as well as allowing grows inside of retail stores. 
We should have followed the alcohol/tobacco path in which they separated production from sales so that they could control things, and disallowed home production for quite some time. 

So, at this point, we need an elliot ness to go in and take out these gangs. 
Obviously this will not be popular here but I think that those that are honest about pot will admit that they do not want gangs involved.