Remember, the vast majority of offline drug deals do not consist of driving to the hood to pick up something from a gangster. I think this mis-perception clouds a lot of the analysis of operations like the Silk Road.
You don't have to move far up the chain before you see some serious violence. Personal use weed dealer? Probably not going to get killed. But robbed? Yes, definitely, seen it happen many times. Personal use coke, ecstasy, heroin dealer? Much more likely to experience violence. The dealer one level above, supplying the personal use dealers? They get killed all the time, despite not being drug kingpins in any sense. It only costs 1000$-2000$ to have someone killed in many parts of the US, so that should say something about the chance of violence that small-time dealers face.
Silk Road was more than personal use sales, I'd bet the majority of its revenue came from pounds and half pounds of weed, sheets of LSD, and orders of 500+ ecstasy pills. Heroin and coke haven't caught on as much yet in the online scene, with prices still a little above what well-connected users can get on the streets, but give it time. Also keep in mind that the online drug scene is more than just SR/BMR/Sheep and that there are private forums that deal strictly in wholesale.
If you're interested in an observed account of a drug gang, there is a book called "Gang Leader for a Day" where the author spent a lot of time in a housing project, with the guy who ran that faction of the gang. It has its flaws but it was an interesting read:
http://www.amazon.com/Gang-Leader-Day-Sudhir-Venkatesh-ebook...
Anybody running a small delivery line is almost always carrying an illegal gun, and willing to shoot competitors over peddling 8ths of coke.
if you read the report about the 1st silk road, you'll see that's not true
Alcohol and tobbacco dealers aren't involved in shootings in the streets - instead we find them in their shops, carefully following laws and doing business peacefully. Nor are their customers suffering from adulterated goods, or committing robberies to afford black-market prices.
Zetas do not hold up trucks full of tequilla and beer going into the US for extortion because they would be arrested. When your business is legal the solution for dealing with thugs is simple: call the cops or sue them. When you are gray area/illegal your only negotiation is to pay them or pick up a gun creating an all out war.
There are problems with some of the manufacture of cannabis. Criminal gangs use trafficked workers, forcing them to work in cannabis farms.
If I was a criminal gang using slaves to grow cannabis I think I'd market it as some home grown organic low yield crop with images of open fields and nice trees.
Just like eggs from caged hens don't show battery farms, but happy chickens walking in green fields. http://www.ecolovers.co.uk/wordpress/labelling-matters-the-r... etc.
It happens in England.
Offline there is: - competition via violence - political narcoterrorism - profit maximization by product dilution - profit maximization by product deception (most street MDMA is amphetamine+nBOME mixture)
Online there is: - competition via quality, price (violence impossible in anonymous marketplace) - political separation via anonymity - drastically reduced product dilution (people do reviews with sources like ecstasydata.org) - drastically reduced product deception (see "The LSD Avengers" for example)
When you contrast these aspects you see that the online marketplaces do operate like a free market with the biggest difference being the incentives associated with deceptive vending. I think thats valuable just because it provides a real world simulation for what variables of legalization would look like without forcing any one country to take the initial plunge by themselves.