No matter who threatens you, they can’t see what’s on the paper ballot you put in a box. There’s people at the polling station that ensure that.

If there’s any way of tracking your vote, someone could threaten you, force you to vote a certain way, then force you to show the verification afterwards.

The safest way to ensure everyone gets a fair vote is paper ballots in a box.

I know the US uses a lot of mail-in voting, and that you generally deem it to be secure. I also understand that the US is a far less densely populated country than my own, which makes mail-in voting more necessary. However, we don’t have that in my country, and the reason I’m glad for it is exactly this: There’s no truly effective way to prevent anyone from forcing someone else to mail in a specific vote.