I don't know, I mean surely there are some network effects of the more users that are using heroin the more that safe practices are developed, shared, and (soci

I don't know, I mean surely there are some network effects of the more users that are using heroin the more that safe practices are developed, shared, and (socially) enforced. It'd be interesting to see if anyone has studied that. Granted, a counter-argument might be that even if it were safer from greater use it may just be that greater use nearly always leads to greater regulation.