The reason we won't delete an account is because as long as the account exists, we are able to maintain alot of information about that account which we use for future moderation. If we delete the account, we lose the information.
There are alot of things that happen behind the scenes here. If you knew how much we deal with, you'd know how good of a job the mods do at keeping most of our serious moderation behind the scenes.
Many of you throw the word "censorship" around as if it's a bad thing. When action is taken against a poster or a thread, it is done with good reason. You may not all agree with it but, frankly, we don't care. Our obligation is to the entire community, not just the few that, ironically, are the consistent whiners.