If you don't wish to have comments then turn off comments on your blog. If you do want comments then turn it on. If you don't like a comment, comment about it and what you don't like. If you do expect a comment back again.
If you wish to comment on a comment and want the comments to end then don't comment on the comment. The moment you comment on a comment depending on the mood of the other you may or may not get another comment.
Much like GAVSD if you wish to see the cycle stop: Stop commenting in return, let the last comment stand and remove the emotional attachment - IT ISN"T PERSONAL.
Now, if you comment and I don't like it I feel it is rude of me to return a comment then cut off all responses thus forcing my side or opinion as the last opinion.
I welcome all response, comments and critiques to my writing here on my blogs. I will moderate the comments only to keep spammers and such out. I will always approve all comments to my blog so all readers can follow, learn or ignore under their own decisive power - not mine. If I feel that a continues written dialogue will not benefit me then I will simply let the last comment stand and move on.
Those who have followed my blogs for the past years know I can go off on a tangent. I have had such exchanges and the comments were always allowed unless spam oriented, etc. I believe the blogasphere is meant to be an exchange.
If you blog and cannot stand the heat from others comments; good, bad or indifferent; then turn off the commenting and you won't have to hear, read or listen to anyone.
Just ranting a bit. Another blog I enjoy apparently received some comments they didn't like so they ranted on that then cut off any commenting - pissed me off. That blog is off my list which is too bad because the blogger tended to put out some pretty decent stuff.
Bye bye blogger, sorry you can't stand the heat. I am off the rant wagon now and back onto marital stuff.
Sigh, phew, slow outward breathe to relax - now a huge