Earlier quoted context omitted.
No they don't, Google and Bing respect robots.txt. Most websites would open it up to them because they need the traffic, so it's a type of scraping that is beneficial. Any other scraping, especially when ignoring robots.txt, is unsolicited. And if said website takes additional advanced anti-scraping measures, and you persist in bypassing that too, then to me you're clearly unethical, even if it's technically legal. "…
No. robots.txt is not something that is defined and enforced by the law. Just because someone came up with some 'recommendation' like robots.txt does not mean this is the law
You failed to make a meaningful counterpoint; the legal/ethical distinction was made clear in the parent post.