No, it's the other way around. If you put a comment "don't do foo" in your code, you're biasing future readers, human or artificial, to think about foo when you explicitly want them not to.
It isn't about making readers not think about foo. It's about biasing thought about foo in a particular direction. And I've seen it work multiple times: agent mentions it encountered X comments in the code and revised its action as a result (yes, I read live agent transcripts).
