I could have a requirement that I would only buy your credentials if the envelope is still sealed so that I know that you haven't gotten a copy :)

And with voting-several-times, I would of course force you to sell me your credentials so my minions can perform the online voting instead of you. So that is no real protection either.

First you might now vote accoriding to your bumper sticker, you might live in an area where you have to pretend that you vote for X when you in secret vote for Y, and secondly an infected machine does not only collect your vote, it would of course have no problem to change your vote just like e-banking trojans work.

To add to your list of problems, consider what would happen in families with a controlling spouse and online voting! And what would stop your employer from telling you how to vote if you want to keep your job and with online voting he's even able to see that you voted as he told you.
Not to mention vote buying, with todays system you cannot buy votes since you cannot verify that they actually voted the way they told you, with online voting you can check yourself and thus this will enable large scale vote buying, script it and it won't even require a lot of resources.

I don't know how it's done where you live but over here (Sweden) all the manual handling is performed by members from opposing parties so they will each monitor each other so to speak, and I as a citizen has every right to remain during the whole process and thus become an observer. Crashing that system would require quite a large amount of resources.
It's not that mistakes and fraud doesn't happen with the current system, but the thing is that each such attempt has always been detected and reported due to how it's implemented. And that would be the hardest part to do with an online/electronic voting system.

Create a .desktop file for your script: https://linuxcritic.wordpress.com/2010/04/07/anatomy-of-a-desktop-file/

That's supposed to be part of the training that you do in order to get the drivers license, at least it is over here.

That is exactly what happened here in Sweden. And the social workers who works with prostitutes are worried since they now no longer have contact with the prostitutes since they are hidden, there is great fears that this also means that they are worse threated by their pimps since the whole operation has gone way more underground.

There's a very good book out there for you to read, The Legacy of Ashes - The History of the CIA. Once you read that (and it's based on the official CIA history documents) it's quite clear that any one who bases their actions on information from the US intelligence community does it wrong.

No it's not a bullshit metric. Minimizing the amount of work the applications has to do in order to use the feature means less code that those applications coders can fuck up while the larger number of lines of code that is "under the hood" is shared so more work can be put into it in order to make it secure.