I write most of my HN comments in the spur of the moment. As a result, they're often inaccurate, idiosyncratic, poorly explained, or just weird. If anybody asks, I ususally try to clear up any confusion.
This isn't necessarily a good idea, but if I thought too much before I spoke, beyond a cursory look to see if I'm violating the rules, I'd be to afraid to post anything interesting, or anything at all beyond polite agreement with everybody, which is so very dull, don't you agree?
2933 votes and countless interesting discussions later, seems to have worked our okay for me.