Very disingenuous argument from the prosecution here: There was undoubtedly disproportionate use by criminals, but it wasn’t because Tornado Cash was built for them. It’s because normal users were already deterred by the looming threat of exactly what happened: the tool being banned. Privacy would otherwise be a completely mundane use case. When the devs launched Tornado Cash, they had no idea criminals would come to dominate its traffic. That wasn’t part of the plan: it shocked them. In reaction to that development, they built a compliance tool so banks and third parties could demand cryptographic proof of innocence from users. They also added Chainalysis filtering to the front end UI code they published. That was the extent of what they could do.