How is this sporting? The defense has no idea if the ball was legitimately snapped. They may fear being penalized for a dead-ball personal foul if they attempt to tackle the ball carrier.
UC prior to the snap!
As an official, I am going to specifically let the coach know this is illegal.
If you have a hard time with the UC call, try this:
Once you hear the words, "wrong ball", blow your whistle to kill the play. Then look at the ball and state, "Looks like the correct ball to me". Then go back to your position and wait for the ready-for-play.