I think the reddit upvote downvote design is just one example of BAD UI that doesn't take into account the human element of the interface. Imagine if when you spoke with someone in real life, you added an upvote/downvote every sentence they said. This is why product designers need to be way more concerned with ethics than they are and companies need to give more respect to the product design role it is not just drawing pretty pictures you are shaping someones psyche.
