Comment by e40
A doctor that over-prescribes them would be arrested, too. Or one that prescribed it to someone for a non-medical reason. (There are many of those latter docs.)
People that sell fentanyl (or similar) are very bad for society, to avoid the triggering "evil". Look how many people have died in the last 10 years. It's insane.
EDIT: I personally know a young man that died from a fent overdose and it's likely he didn't know what he took had fent in it. 22 years old and the whole world ahead him. Completely destroyed his family.
They would be arrested for over prescribing now. If you look at the state of the world 20 years ago or more it looks much different from here.