At least it'd be no worse than we have now with voting my mail.

Concerns about vote selling and coercion are already gone. It's practically impossible to actually prevent people from filming their votes as they are cast, and livestreaming my vote to you is just as good as having you sit in my doorway for it.

The beauty of paper ballots is you can spoil them and get a new blank sheet. Sure, livestream yourself filling out your ballot. That doesn't mean you actually cast that ballot. The poll workers will tell you to put your camera away when you're outside the booth on the way to the ballot box.

I don't know where you live but all of the polling places around me are very clear about not allowing photography. Similarly, someone who has pressure to vote a different way has the option of taking that picture to show to their boss and then getting a new ballot after voiding the old one.

Yeah I can't solve that part :-P Is this what people mean by "the identification problem"? I must have misunderstood.

I don't believe they'll be able to prove they voted for a candidate without giving away their keys.

If your boss, union leader, controlling spouse, etc. tells you to vote a certain way, they would gain the ability to demand that you give them your identifier if it's public or, if not, login and show them the final vote status. This is very hard to detect and anyone proposing a blockchain needs to learn why election systems are designed the way they are first since this is not a hypothetical problem.

We have plenty of jurisdictions with vote-by-mail who've been doing it for a long time. Long enough that we should have some idea how common this occurrence is. It seems like the answer is that one vote isn't worth nearly enough to risk the penalties involved.

They could sell or rent the keys though.

This is why your key should also be used to replace your social security number.

So … anyone who's ever had access to it (spouse, employer, school, etc.) can view your voting history forever and there's nothing you can do about it?