In the API that is an explicit option, as well as in the paid consumer product as well. The amount of business that they stand to lose by maliciously flouting that part of their contract is in the billions.
Isn't the only way to do that is for ChatGPT to run locally on a machine? The moment your chat hits their server they are legally required to store it?
So if Microsoft gets a judge to compel Hacker News to give up your IP address, you'd be okay with that. Because it's 100% HN's fault for collecting the data in the first place? Are you a real person, er, toilet?