Lots of dark market vendors know what they're doing with BTC so the one's you read about make all sorts of mistakes.
The cops go for the low hanging fruit and with drug dealers there's always plenty of dopes!
If BTC were as traceable as a Paypal/bank like payment there wouldn't be any dark markets in the first place but every year they get larger and larger. Also, there's a hidden advantage to society of dark markets (not saying they're good for society) in that people will always buy drugs and seek them out, but with dark markets there's no violence, no street shootings over turf, no dealers hanging around on corners and so on. Imagine if all drug deals were done online, what would our mean streets and bad hoods look like in relation to the present?
Women statistically are in so much more danger from buying drugs on the street so buying them online is a massive boost to their safety (assuming the drugs don't kill them!).
Again, not supporting any type of drug dealing or using just pointing out some facts.
