I think this is a detriment to our community, and I say this as a reformed (or at least reforming) flamer who used to take after that style. Actually I think one of the most positive things about participating in the HN community is that toxic commenting is not rewarded nearly to the extent that it is on other forums. It's taught me to be more civil.
I've interacted with enough top programmers who are always nice to know that flaming isn't a prerequisite to getting your point across. Besides many excellent HN commenters, I think of John Resig, Shawn Hargreaves, Sanjay Ghemawat. I strive to be more like them, and less like the people who are known for their flames.