Where does it concern GitHub's security model? This is a serious question, I am not a GitHub user myself. The only thing I get from the article is "people trea

Where does it concern GitHub's security model? This is a serious question, I am not a GitHub user myself. The only thing I get from the article is "people treat URLs as eternal, even if the site does not provide strong guarantees for that." But that is not news and moot to debate, as a site's policy can change anytime and then you are still screwed. And nothing of this is specific to GitHub.