If I write something like "<something> is a load of crap in my opinion" I don't mind getting downvoted, but a lof of times I get downvoted even when I am strict and technical, and again this won't bother me if people would supply a response.
Having a "well formed" comment simply downvoted is equal to simply replying that "Your comment is so crap that it's not even worth my time to explain why.".
> You've generated discussion.
Yes it seems that there is a way to do this properly, as I wrote I still get downvoted, even when I'm polite, but it looks like the bright people greatly outnumber the others here in HN.