So if I don't spend 20minutes making sure my reply is perfect, I will get downvoted.
Let's see if I get downvoted here too, as I wrote this on the go without checking all my facts.
But you know, making sure your post is factual correct, nicely worded and thought out seems to be a good consequence. Reading that I actually wish I was afraid of downvotes so I put more effort into some of mine.
But if you use HN as a funnel for brand building, talent acquisition, or as an authoritative voice for your company, then they can be costly.