Jay, I fully appreciate your effort to make our democracy work.
I don't know if this is universal, but where I live, our ballots are huge, and have to be filled in by hand (ovals), then scanned at a central location.
I don't know why, but there is no curtain around the scanner, and for as long as I recall (except this year), some volunteer tells us HE has to put the ballot into the scanner (and of course he reads the votes first).