Commenting on downvotes is pointless, and it's even more pointless the earlier in a comment's life you do it. I've seen wild swings in comments before based up

Commenting on downvotes is pointless, and it's even more pointless the earlier in a comment's life you do it. I've seen wild swings in comments before based upon the time of day. E.g. mid-day upvotes, late day downvotes. Or vice versa.