So does this also forbid pre-typing incoming calls manually? For example typing "inc snow" in ops chat right after taking a node, when it is still clear, then clicking away from the chat window to save the incoming call in the window, ready to be used simply by hitting enter (and maybe adding a number) at will. Planning ahead would certainly seem to convey the same kind of "unfair advantage" of not having to fight and type inc calls at the same time as a text macro might.
You're not using an external tool that the other parties don't have access to. It's no more an unfair
advantage than using a stun or interrupt against some poor sap who isn't smart enough to do likewise. He's got the tools; you can't force him to use them (or be blamed when he fails to use them).