How do you equate a GD with a DEVELOPMENT background (Sil had never been a developer iirc) saying the nano is intended to block CH, with him being clueless about the game mechanic?
I'd wager Means (or any FC employee) has more idea about game mechanics than you.
If you don't feel it should block CH, or see a problem with the design around the nano then say so, saying "he don't know s**t y0" just makes you look like an idiot.
So now we have an answer about the nano, yes it is supposed to block CH.
Now the Agent's cause is to deal with how easily the nano can be landed on Agents, or the available tools via the FP system.