How to delete a Stack Overflow / Stack Exchange Accounts account?
The description of the service:
Stack Overflow is a privately held website, the flagship site of the Stack Exchange Network. The website serves as a platform for users to ask and answer questions, and, through membership and active participation, to vote questions and answers up or down and edit questions and answers in a fashion similar to a wiki or Digg.
If you haven’t posted on the site, it’s just one click. If you have voted or posted, please contact the Stack Exchange Team: Visit the contact form and select ‘I need to delete my user profile’. After you contact us, the team will reach out with further instructions.