Hard drug users and dealers tarnish people who use restricted drugs as a medicine. They look down on people who doesn't use their type of drugs. I think for the best of all, markets should ban all hard drug vendors and for the damage they had done and despair they had brought, their bitcoins should rightfully be seized and never be allowed again.
Regulating the drugs is better than not. The Drug Markets are for drugs. Please use responsibly. There will always be a supply and for sure the demand is always there. Be responsible as hard drugs will always be here.