I recognized, that only registered and logged in users can reply to a comment. Others can not. But this is a necessary feature for all to keep the comments trackable and readable.
Would a user answer to my reply to her comment, her comment would be cued at the very end without a visual connection to the comment it refers to. This should be organized like in the forum.
(Although I am convinced this is skin independent, it is briks_skin I am using