I pretty sure the closest thing to deleting an account is the Log Off button. Am I wrong?
Being this site does not mandate a users time logged in I would just stop by when you need to or want to. During my work week Im not nearly as active and really Im not nearly as active as I once was, just in general. I stop by when I can and check up on things. Its usually the same ol thing with noobs asking the same question without searching for the answer first.