If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
If post a response to someone, and someone replies to me, and they get a single silent downvote prior to me reading their response, I find myself reflexively upvoting them just so they won't think I was the one who did the single silent downvote, since it seems plausible to me that if you have a single downvote, and no responses, the most likely explanation to me was that it was from the person who you replied to downvoted you, and I don't want people to think that.
Except, then I seem to have gotten my opinion of the post hopelessly biased before even reading it, because I'd feel bad if I revoked the upvote, let alone actually downvoted them, and I feel like I can't get back to the status quo of them just having a 0 point or positive post.
It also doesn't seem like it would have the same effect if someone replied to me and was heavily downvoted, but I don't actually recall that happening.
If I try to assess this more rationally, I get the suggestion 'You're worrying far too much about what other people MIGHT be thinking, based on flimsy evidence."
Thoughts?
I upvote people who reply to me on unpopular threads disproportionately often, because I want to encourage that.
I upvote people who I think have an unfairly low score.
Given this, behaviour much like yours follows. I think that's fine.
I'd recommend always reading before voting though.