that suggests they are overutilized elsewhere and work pretty well here, I am not adverse to opposing viewpoints, I just dont want to see plainly dumb comments, if you overuse it, then it loses meaning.
(taking this thread as a test data, while I dont agree with a lot of what people have said, I wouldnt have downvoted any)
It sounds like you didn't actually understand the dynamics of the HN community. You sound silly insisting your initial impression is even partially right, when the whole community is telling you the opposite. (This applies only to posts, of course. Downvotes still don't exist for stories themselves, outside of flagging.)
As for your assertion that not disclosing the karma threshold for downvoting is 'bizarre', I'd argue it's useful not to provide an exact number. Enough video games have 'achievements' listed out for people to obtain... I'd rather have people participate honestly than just to gain more 'abilities'.