Perhaps the way to delete the information in the account is to replace the status posts, comments, photos with junk. Words and sentences that don't mean anything; photos that are noise. Perhaps there's a way to do that in an automated fashion. I'd use that.
You're making me wonder if someone intentionally violates the TOS by, for example, uploading porn if they would delete the account. Facebook does delete accounts that it considers spam so they might just delete such an account.
