Board Thread:Support Requests - Getting Started/@comment-26948492-20150906162923/@comment-25428589-20150906164210

Drixxler2348 wrote: Also can you delete the entire history of the account so it never existed? No, although I would guess in extremely special cases (for example, if your personal safety was somehow at risk because of your contributions) staff could remove your contribs.

As QuackersClocks said, you need to contact staff about the matter.