As an EU citizen, I'm using my right to deletion to get #StackOverflow to remove my data for me.
Here is the link to the form: https://policies.stackoverflow.co/data-request/
I requested a copy of my data for my personal backup and to confirm if they fulfilled my request. #GDPR
Edit: As people noted in the replies, this will probably not remove your questions or answers, but only your profile. I'm going to edit with my result once they have fulfilled my request.