Mixed into a couple reasonable arguments, it mostly opposes the "nofollow" feature on links (which makes search engines not count them) because it lets people control who they give link credit to, so now they can sell it, or not give credit to sites they don't like.
The anti-nofollow people act like nofollow is dangerous. But no one has to use it. They are really against anyone who wants to use nofollow having the option to. In other words, they want to control people they disagree with. They advocate the world being such a way no one can do anything but enact their theory of how to live.
Usually anti-human-power views are associated with, say, gun control advocates or people who hate technology. But I think it's very widespread. Any sort of authoritarian view that does not want to allow people to make their own choices is anti-human.