I don't consider people who use throw away accounts to spout crap and hide in cowardice to be real commenters... their feelings an opinions are worth the value of the throw away account they created to spout them.
That does not matter. Each of us on HN has a responsibility to treat each other with respect and civility. If you find you can't do that in a particular circumstance, refrain from commenting at all. Expressed another way, don't feed the trolls. Flag if you feel appropriate, and move on.