And you won't accomplish anything by shutting down Silk Road. Most of drugs that get in a country don't do it by packages sent by Silk Road. LE (Law enforcement) is already low on resources, so they better use them for bigger 'operators'.
Even more: if they happened to be able to close Silk Road, or make it impractical or unusable, another similar site would rise within weeks. If they don't understand this, they simply don't understand internet.
This is another example of how useless does the so-called "war on drugs" get.