I voted on Saturday, too. Some of the more enlightened states in the US allow voting by mail.
When you vote by mail in the comfort of your home, how do you guarantee that no such tampering happened?
I voted about three weeks ago.
"Convinced that the people are the only safe depositories of their own liberty, and that they are not safe unless enlightened to a certain degree, I have looked on our present state of liberty as a short-lived possession unless the mass of the people could be informed to a certain degree." --Thomas Jefferson
Case in point, at least two HN readers (OP and myself) didn't know homeless people could vote by mail at the US Post Office, but I know at least one of them is very well-informed on the issues.