Re: Herd immunity
Reading that entire paragraph, I think what we have here is a Buzz Word Bingo player. Or to mangle Inigo Montoya: "I do not think that phrase means what he thinks it means."
Honestly with sophisticated malware being what it is today, I don't think you'll get herd immunity effects even for opportunistic stuff. It's too easy to have a C&C that scans for vulnerabilities once the initial payload reports in.