My point wasn't to paint a water-proof scenario. It is to illustrate just how unreliable and dangerous mail-in voting can be. There are other vectors for manipulation.
Not seeing the ballots won’t necessarily stop them from trying to vote. They might ring up to complain that they never got them. They may try and go in vote in person. Trying to vote using someone else’s name or ballot can very easily land you in hot water.
Hint: They never see the ballots.
My point wasn't to paint a water-proof scenario. It is to illustrate just how unreliable and dangerous mail-in voting can be. There are other vectors for manipulation.