Oh, you mean like Katherine Harris?
The allegations of tampering are not some fringe Truther bit, they're much more credible and substantiated than you'd like to believe. There have been some independent hacking trials that have shown just how easy it is to change the output from those electronic machines, and that paper trails are not necessarily a cure either. Here's a link to a BoingBoing article about the University of California Santa Barbara Security Group's test of the Sequoia voting system. link
Voter fraud has been around as long as there have been ballots, but the ability to commit it on a larger scale has only gotten easier. It's not paranoia, it is the law of the marketplace: any practice that will give your product an edge must be employed, otherwise you fail your stockholders. Winning is more important than how you win.
I'm not fond of absentee voting either, but that's partly because I always liked visiting with the little old ladies at the polling station, and there's something warm and fuzzy about voting in the company of your neighbors.