you're supposed to downvote things you disagree with on HN. Here's Dang pointing to PG saying that downvoting for disagreeing is what you're supposed to do
Edit: It works since to downvote you need 500 karma, but everyone can upvote, so getting many upvotes is a lot easier than getting many downvotes.
Oh, I see. You personally haven't been downvoted into oblivion and/or had the door slammed in your face, so everything is cool then. 100% of the people who were censored must have been terrible people. Heil Dang, etc.