No one is victimized you say? How about children that have a (hypothetical) direct access to hard drugs?
In my personal opinion, selling drugs like that is much worse than selling counterfeit money!
As you say, it's hypothetical. Kids who are on the needle are not likely to have the knowledge required to buy on Silkroad. No one denies that children should not be considered fully responsible for themselves and that there should be controls, however.
It is the war on drugs itself that causes the misery. The government is to blame. If dealing with drugs were legal but regulated, it'd be much easier to enforce access control, because it would kill off the mafia because adults would buy the legal stuff while drug stores would lose their license and get punished when selling to kids.
It's the same with the repression of sex in the US. Nowhere in the western world are so many child pregnancies and sexually transmitted diseases as in the US. Sometimes I think the US govt fully knows that and the results are actually desired.