Why US Tornado Cash Sanctions Are Concerning for Open Software
youtube.com
youtube.com
I would recommend watching the video as the speaker is well educated on the subject of law and blockchain, but you can also see an article on the sanctions here[1].
[1] https://uk.style.yahoo.com/government-takes-tornado-mixer-ma...
The relevant trait of open source seems to be that the authors are readily identifiable. The US OFAC decided to sanction Tornado Cash for reasons that have nothing to do with open source, and then (probably) used open source to find the most important maintainer, and sanctioned him personally.
Finding the most important maintainer of a closed-source web service shouldn't be impossible, but open source clearly makes it simpler: No subpoena required.
The speaker talks about the implications of the first US sanctions that target open source software and ownerless smart contracts.
After the fact, where it can.
Effectively, "next generation" software has enjoyed much freedom from government intervention — in fact, they're usually the ones building it, and/or using it until it becomes too mainstream.