I don't think that analogy holds up, since the viewer of a web page is not reselling the content (which would be the unethical part). It would be more accurate

I don't think that analogy holds up, since the viewer of a web page is not reselling the content (which would be the unethical part). It would be more accurate to ask whether removing the ad pages in magazines you keep for your own use was ethical. The obvious answer would be: of course.