Here is an post about bitcointalk account deletation. You can check this. Hope you will be clear.
Deleting accounts doesn't mess up any threads, like
this thread. It just changes to anonymous, with no profile information. Post stays intact.
As you can see here, I only change the username to "Anonymous" on request.
The pharmacist said here about the issue
Are you getting too paranoid here or what?
Anyhow, this question has been asked before, and apparently the answer is that the only thing you can do is delete all your posts yourself and change your password to something so complicated that no one is ever going to crack it--and then just walk away. Mods aren't going to help you here.
Edit: Just FYI I'm pro-vaccination.
hilariousandco's opinion
It's not possible. Just abandon it.