I guess, same rule could apply there too.
That basically removes it. I know my assumption would be the guy wanted to go off on a tirade if he was asking permission for a private test or audio link. As it is, I can open a private text line to him and the content of my text tells him I am not some raging a-hole who is steamed about getting shot down. I suspect I am in the great minority on that though, although I guess it could be a more common use than people think. I've never opened a private audio channel before.
turn off all cross country comms in the arenas cept for 200.... simple and way over due 
Some of us like to talk to each other and are not wrapped up in the chess piece vs chess piece vs chess piece war.
I am here for the fights and when a fight is really good I sometimes like to talk to the other guy about his end of it as well. For the record, I have had really good fights that I won and that I lost.