As interesting as it all is, it's also very concerning for Law Enforcement. While petty things like drugs don't really worry me much, the advances in the anonymized distributed networks like this do mean that things that previously required big budgets of national intelligence agencies become easier for common malcontents to use. The article essentially describes a quintessential terror cell structure, but with the added benefit of 0 direct interaction. The separation of layers has always existed with limits (IE you had to have some form of communication) but this potentially allows for goods and services to easily be passed from fully anonymized layers to others without every having any interaction at all.