But In Brian Krebs' book he highlights the high quality of the drugs sold, and even the fact that big pharma investigated them expecting to bring people some scary stories, but they didn't find any. These pharmacies care about their customer's experience (of course they do, the want to sell you more).
And I will bet you, at any odds you like, that the harms done by heroin (uh, 'medical diamorphine') and other opioids outstrip the few virtuous uses a hundredfold.
[0] Perhaps second to the so-called dark web, though that serves a discovery purpose which is a bit orthogonal (and complementary) to Wickr.
Or, instead of buying stretched medication that can kill you, buy from somewhere like Costplusdrugs.