If you have an outside agency racking the balls during tournament play (referee or what have you), is it considered offensive or bad etiquette to check their rack before you break? I'm asking because all the pro matches I've watched where the referee or "rack girl" racks the balls, the player never seems to check their rack. Personally, I check the rack no matter who racks it. If my own grandmother racks the balls for me, I'm gonna check it.