I had the oddest experience in trying to upvote his comment. I’m on mobile so it may just be be that. But, when I upvoted, there was a small delay but it seemed to register a downvote. So I unvoted and tried again. Same thing. Anyway, assuming HN mods do not have some switch that turns every vote into a downvote on particular comments. I think it’s fine to space out the upvote/downvote buttons. Users shouldn’t be losing minutes of their life trying to convince themselves that their vote was properly registered.