For this reason I generally don't care about comments at all, except for when comments are negative, as it inhibits the ability to read the comments. I'd actually like to see that practice eliminated, since I find that often comment "gems" have negative karma, but simply take on an unpopular position.
"Resist complaining about being downmodded. It never does any good, and it makes boring reading." http://ycombinator.com/newsguidelines.html
I think you mean "comments which are unpopular here", not bad comments. Also, by saying "extremely highly" you are implying that GP's commment is a bad one? Care to say how?
The comment I replied to ("You're right that ... You can draw your own conclusions from this.") is a bad comment because it contains no interesting content, just whining about "downvotes without replying".
The site guidelines are there for a reason: everyone should follow them.