People voting more than once is even less realistic way to compromise an election. That requires a lot of dedicated people and NO ONE making the conspiracy known. If one of them talks and fingers the person organizing them, its game over.
If you want to compromise an election in that way you don't do it on election day, you do it via absentee ballots. Far easier since you have plenty of time to do it instead of trying to crowd it all into a single day.
This is why voter ID as "fraud prevention" is so stupid. There aren't huge numbers of imposters voting on election day, there are cameras in and around most polling places and it would be trivial to be caught even after the fact (i.e. if you voted using someone else's name and then they showed up and were told they were marked in the rolls as having already voted) You'd do it via absentee ballots, like the crooks in North Carolina's 9th district who were caught doing this in the last election (and it sounds like they'd been doing this for other elections in the past too) None of the voter ID plans address absentee voting at all.
Biting the hand that feeds IT
