(Sorry, me again.)
I understand that it is not preferred on SE sites to post an answer in comments. I also recognize that it is often done anyway when someone knows the answer and doesn't want to take the time to post an answer with "canonical" references.
That doesn't mean it's a good idea to do this here, especially on a new site where answers - good answers - are important.
However, is it better to down vote or close without explaining why one is doing so?
On this question, someone was asking a question which I knew I was going to both close-vote (I don't believe we should be a consulting service for private product development) and down vote (the question did not show any research effort; it is not useful.)
This is the scenario I pictured that prompted the explanation I gave in this comment.
- Me: down vote and close vote for reason X. Leave no comment.
- OP (or another user with a different opinion): Why the anonymous down vote? How can I improve my answers without feedback? or:
- OP: Why the close vote? This isn't X at all. It's very non-X. All I'm asking for is a specific set of symptoms of heart attacks.
- another user: I don't think this is too X either.
This reflects my dread of comment-annoyance. I learned very early on in SE not to ask for explanations of down votes or close votes. I also learned that when I give them, it often results in unpleasantness. (I made a meta post on EL&U early on in my SE experience. My opinion hasn't changed.)
Although, to my shame, I have been guilty of them myself on more than one occasion, I usually avoid comment wars like the plague. They bring out the worst in many people, myself included. I also think it detracts from the professionalism of the site, and causes unnecessary drama. But that's a personal opinion.
If I don't want to answer a question (for whatever reason) that I know I'm going to vote to close, on some sites (like EL&U) it is common to give a quick, helpful answer so the OP - who might be a contributor someday - doesn't go away mad.
Not to worry, I will try to make my behavior fit a site's culture and rules. I would like to understand, though, what the harm is in commenting on an answer that I strongly suspect is going to be closed. Is it because it discourages someone from answering? Also, anyone who has an idea on comment wars and sundries and how to avoid them (just let it be, or, if out-of-line, flag a mod is my usual stance), please feel free to share.