However, at the same time, periodic testing and background checks are becoming a way of life. The big casualty in the War on Drugs is justice. Poor teenage drug users get incarcerated much more frequently than rich teenage drug users. The US government routinely routinely ruins the lives of young people doing nothing differently than what George Bush or Barack Obama did when younger(and in Bush's case had a father able to pull political strings to get his cocaine bust sealed).
I think that something like Silk road is pretty much inevitable-but so is expanded drug testing that will eventually include folks in positions of power and responsibility. At some point use of drugs may do little more than restrict someone from living in particular cities or communities-and lying about drug use to business associates or constituents will become impossible-but without the act of lying, much drug or chronic alcohol use will loose its allure.
No, the US government cannot reliable shut down Silk Road-but it could create a sound drug testing program for members of congress, the President and all senior members of the government. It could require that all police and prison guards-and attorneys be free of hard drugs or chronic alcohol abuse. Here is a published article where I developed some of these ideas previously.