You can get yourself banned so you can not login but getting banned probably isn't the best way. You might be able to ask Gantic for help if you really want to get your account deleted.
Protip: Go to your profile, write some nonsense email-account, then go to the password and change it to something scrambled you can't remember. Save the changes,log out, leave. Or email Justin from the email account associated with this account. You will see more about that in the support section, there is a stickied thread for it.
