Well, yeah, for anonymous sources. A random blogger they're writing an article about usually isn't an anonymous source. The ethics publishing name etc. are abs

Well, yeah, for anonymous sources. A random blogger they're writing an article about usually isn't an anonymous source. The ethics publishing name etc. are absolutely debatable, but the anonymous sources you are talking about are something completely different. Those are people who only agree to be sources for the story on the condition that their anonymity will be protected.