Arguing balls and strikes

[Snorg]

I've tried to search past posts for this, to no avail, so I'll just ask. I apologize if you have recently discussed this.
I know that arguing balls and strikes is a big no-no, and any manager that persists at all, or comes on the field to argue b/s has pretty much bought his own one-way ticket. But what about when the manager goes to the mound to talk to (or change) his pitcher. It seems that there is a convention (at least at higher levels) that when the PU comes out to break up the conference, the manager can usually get in a few comments that he might not otherwise.
I was just curious how some of you handle the mound conference in regard to balls/strikes. Do you let the manager say something there that he could not say elsewhere? Or is arguing b/s the same here, there, and everywhere?
Thanks for any and all responses.