[nonameiguess]

I see nothing here that indicates a person has the right to have Stack Overflow answers deleted: https://gdpr.eu/right-to-be-forgotten/

First, I don't see how or why an answer would be considered "personal" data that is subject to this regulation at all. As far as I'm aware, that means data about yourself, not every piece of information about everything you have ever committed to public record. Second, Stack Overflow pretty clearly serves an informational purpose in the public interest that would be impeded if answers get deleted, which specifically makes it exempt.

The same thing goes for Europeans thinking Hacker News needs to let you delete comment history. If you say more than you intended in a specific instance, giving away information that can be used to identify you, you can ask to have that deleted and they will do it. In fact, I've done that myself. If you ask to have your entire comment history deleted, they do not have to do that.