You cannot delete your account on stackoverflow without writing to the administrators via email. It is a manual process for them,and they don't delete your account they just rename it and prevent you from logging in. The questions do persist. I'm pretty sure they also deleted my "spam" questions when they banned me.
edit: the stack overflow account is the only one they deleted/renamed.
Not trying to offend, but from the answers I see, a number of them are just not right for SO. They're either very opinionated, or not answering the question itself. The first couple of questions from new users go to the moderators' queue automatically, so they will get more attention than stuff from others... then again, that's done exactly so that new users get the feel for what's acceptable and what isn't.
If you want to try again, stick around for some time. Add justifications / context to your answers. Some of your answers were of good quality and got appreciated. I wouldn't stop because some posts got closed. It is a community site after all and the big idea is that others can rewrite most of your post and if it gets improved that way, it's better if it stays around forever.
I have not logged in since they banned me. I am not going to provide free user generated content to a website that bans active and real users for spamming.
You cannot delete your account on stackoverflow without writing to the administrators via email. It is a manual process for them,and they don't delete your account they just rename it and prevent you from logging in. The questions do persist. I'm pretty sure they also deleted my "spam" questions when they banned me.
edit: the stack overflow account is the only one they deleted/renamed.
Here are my related accounts:
http://superuser.com/users/28269/russellballestrini
http://serverfault.com/users/27551/russellballestrini
I was active, honest, helpful and used my real name.
on stackoverflow my username was renamed to user221014
or
https://www.google.com/#q=user221014&oq=user221014