I have no problem with doing either (so long as pre-arrangement never becomes mandatory), but that doesn't address fairness for illiterate voters at all. Also,

I have no problem with doing either (so long as pre-arrangement never becomes mandatory), but that doesn't address fairness for illiterate voters at all. Also, it doesn't really tackle how a voter-verified paper ballot processing system that involves electronics is fairly described as "a disaster of security problems".