What escapes me is how they solve the problem of having to provide a shipping address at some point. That seems like the real weak point to me, as a buyer. (Yes, I know, PO boxes exist, but to my knowledge, renting one usually requires some form of ID).
Anyone knows how the actual customers solve this dilemma? Hoping they stay below the threshold for being targeted by LE?
Is someone sending you a package sufficient proof you ordered said package to base a prosecution on?
If the package is intercepted, and this happens more than once, I'm pretty sure a prosecutor could at least argue towards that. Let alone begin investigating deeper into how that order was placed. Let's not forget, afaik, payment on those sites is done by BTC. Not exactly hard to trace. "Trace back to where" is less obvious, but I do wonder if everyone who orders makes sure to mix his coins in some way, or only use OTC bought coins...
Not saying it's likely to happen (justusranvier's comment applies), just that I don't imagine it's a solid defence once you receive drug shipments to your home address with some regularity.