My understanding of the ethics of Silkroad is a libertarian one: There is no such thing as a victimless crime. No one is victimized when dealing with drugs. But spreading fake money is a kind of fraud.
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!
Can't agree with you there. Children can harm themselves in countless ingenious ways. How about prohibiting glass? And families with infants shall be prohibited from living higher than the first floor...
Also, cars can be used to harm others too, no? Sorry for the banal example.
Counterfeit money is an ugly thing, not only because it can be harmful (anything can be), but also by nature it awards swindlers and punishes trustful people. Even guns are more neutral than that.