I am not sure if a coach would be making a smart move or not by not allowing a match to start if the powers that be missed a call to "scratch" a ref. I would have to know if this process is anonymous for the coach before the meet starts. If it is an anonymous move (and it should be) then the sense of anonymity goes out the window as the coach approaches the table and the ref is removed. I am sure that if this happens and the coach goes to the table and makes his wishes very public, the ref who is replacing the scratched ref would be very aware that one of his peers has just been publicly embarassed. I doubt that any of the refs would hold a grudge in this case in defense of a fellow official, but there would always be that doubt in the air. I would have to put the responsibility back on the tournament officials in this case, not the coach.