I'm sorry to hear you're leaving us. ):
Unfortunately, we can't delete accounts. We did that one time and it messed up all the indexing on the website.
We'd also prefer not banning on request. We did that in the past and it'd always lead to misunderstandings, complications and other trouble.
I've removed the e-mail account that you had your TI account registered to. At least you don't have to worry about getting e-mails from here. Besides that, all I can suggest is to not log on here... Maybe you're already doing that. ):
Take care and good luck with life.