It’s an old idea that a lot has already been written about, which I’ve read a bunch of, so I echo the existing phrasing partly because I’m used to it and partly to more strongly connect to it and have better callbacks to it that more people will catch. Also, the phrasing is more awkward with “people” or “humans”.
Competing job candidates is the example Ayn Rand uses in her article Chapter 4. - The “Conflicts” of Men’s Interests in her book The Virtue of Selfishness, so you can find some answers there.
Depends. There are laws about defamation. The basic issue is you can’t lie about facts about people and cause damages, but you’re entitled to express your opinions and to share true facts (even if that causes damages).
PS I moved this to the existing topic about the article. Also, please give source links when sharing quotes (the quote from my CF article is OK now that your post is in a thread where the OP links it, but the quotes from Liberalism: Reason, Peace and Property · Elliot Temple are unsourced.)