I wonder if there's a browser extension that checks if the link text is a valid URL, but is a different URL (or just on a different domain?) than the actual link target, and adds some kind of warning for the user if so?
I'm not sure what keywords I'd use to find an extension like that.
This would break every website that wants to track what links you click on by sneakily rewriting the link under your nose. Which, to be fair, is a use case that I'm all for breaking, but it would make Google mad, so it won't happen.