Most of the time I agree with you, and prefer downranking, but I have to take issue with your example of Pinterest, because my experience with Pinterest is that if I'm searching for a specific image, I will always get a thumbnail of exactly what I want from Pinterest, but when I click on it, I'm taken to a page of completely unrelated results. It is beyond frustrating, and specifically blocking Pinterest was one of the primary features that sold me on Kagi.