Could someone look at what the built-in "No" command is caused by? I always wondered whether it had a case trigger or not, it has recorded and tabled lines in both retail FS1 and FS2 but I never heard it so it seems like something might actually trigger it under certain conditions, but I'm not sure.
I'm pretty sure that in addition to the normal "c" communications menu, you can give wingmen orders with keyboard macros (shift + different keys for each command). If you try to give wingmen an order that doesn't work (attack a friendly craft, etc.), you get that "Not here, sir!" response. You don't usually hear those lines, because you can't give those kinds of orders from the normal menu (they're grayed out).