The only part of that sentence that I found terribly relevant was the first. I'm just not sure that there will be enough dealers that are not just located outside of the United States, but located outside of ANY foreign country that would likely hop on an anti-BTC bandwagon. Additionally you have to worry about customs, etc.
Honestly, I'm just not sure that many users are using SilkRoad for ganja. Like you said, it's so widely used. Granted, I'll eat my words in a few months, but it's easy enough to get your hands on that I certainly would have to be in a very uncomfortable spot to risk having weed mailed to me. I'm not really into anything else, though HN keeps me intrigued about LSD, and even then I'm sure I could ask 2-3 people and get that, so I'm not really sure.
I think people greatly overestimate the capabilities of any government, US or otherwise, to police parcels coming in and out of the country. The overwhelming majority of drug war dollars are spent on going after big busts. There practically is no budget for postal packages unless there is something suspicious about them. This policy of course would change if the drug market experiences a shift from locally sourced to postal sourced.
The only drugs that make sense to source locally are those that can be grown locally, namely marijuana and mushrooms. Almost all others are fair game for postal sourcing.
Honestly, I'm just not sure that many users are using SilkRoad for ganja. Like you said, it's so widely used. Granted, I'll eat my words in a few months, but it's easy enough to get your hands on that I certainly would have to be in a very uncomfortable spot to risk having weed mailed to me. I'm not really into anything else, though HN keeps me intrigued about LSD, and even then I'm sure I could ask 2-3 people and get that, so I'm not really sure.