I notice many questions (and answers) posted by accounts which are subsequently marked as "unregistered".
I am guessing that a user will setup an account, post a question, and then "delete" the account; and that this will mark the account as unregistered. This appears to routinely happen immediately after the question has been posted.
Is an unregistered account user able to vote on and accept an answer for the question they have posed, or do such question forever remain with no accepted answer?