[TeMPOraL]

We're not that far yet, but the potential is there. The closest thing are the current bitcoin-powered dark markets, where people buy various kinds of drugs (of various levels of harm and legality), including custom-made chemicals.

[CyberDildonics]

I have news for you, people already buy custom made chemicals from China all the time. It doesn't take darknet markets. The potential is there for lots of horrific actions. They aren't avoided by a government making them impossible, people generally don't want to hurt other people, nor do they want to face the consequences of doing so.