Posts or comments from women: downvote about every second one, randomly.
Posts or comments from black people: downvote every single one, thoroughly, with extra pressure on the button.
Posts or comments from stupid people: sometimes downvote, sometimes upvote, according to my mood swings. Sometimes create an additional lemmy account in order to have a second downvote.
I see the point you are making, or I am interpreting too much into it, but I don't think discussion about subjective, highly variable day-to-day things is useless. Sure, every human is influenced by a lot of factors, but in my opinion there is still something to learn from this. I know I did in less than an hour already.