We go back to an ELECTION DAY and we all have to dip our finger in ink. That’s the only way to be sure.
As the article correctly points out, the idea of “voting in private” is relatively new.
Voting in private does tend to dissipate social tensions. (It noted that once voting went private, that coincided with the first national election where a murder did not occur!).
But voting in private also opens up the possibilities of the current, fraudulent system.