The point of anonymous voting is to ensure that the voter's choices are secret, not to conceal the fact that someone voted. Even in Afghanistan where voting can cost your life, purple dye is placed on a finger to maintain a rudimentary system of tracking who has voted and who hasn't.
EDIT: Let me add, I'm no Kemp apologist, but let's keep the focus on the real failures that occurred in GA... Not exaggerated problems.