It doesn't make any sense to me that this was meant to be a discussion of the hundreds of votor irregularities that were reported. If it was, right from the start, it didn't go that way. That is why I'm focusing on a successful fraud, guys.
If Joe Schmoe votes for Kerry, and Joe Schmoe's deceased grandmother also votes for Kerry, that's a "voting irregularity". It's also a fraud, and a felony. If poll worker Bob doesn't notice Ma Schmoe is actually a 23-year old male, it becomes a 'succesful fraud'.
Let's clear up the ambiguities once and for all. I propose the following conventions for classification of the magnitude of a voting fraud:
Level I: Order-of-magnitude of ten fradulent votes.
Level II: Order-of-magnitude of one thousand fro-voes.
Level III: Order of magnitude of one hundred thousand votes,
or minimum required to swing one medium-rare state.
Level IV: Order of magnitude of ten million votes,
or minimum required to swing one big, gullible democratic republic.
All frauds are assumed succesful.
So, by "stealing an election" we mean a Level III or IV. I'd say both were statistically impossible in 2004 - exit polls, observers, margins of victory, etc., etc., we've discussed this before.
By 'rigging an election', we mean any concerted effort that could
possibly (not probably) swing a state like Florida or New Mex in a very close race. Looking at '00, something like 400 votes from a single precinct could have done it. Order-of-magnitude, it's a 'Level II'.
My assumption is, anything that involves concerted activity between poll-workers from multiple precincts is extremely unlikely to be successful.
An easy axiom is, it is impossible to edit votes once they leave a precint - because precinct results are reported by the media. Hence, any national-scale rigging involves something done in hundreds of individual precincts, and involves hundreds of coordinated Level-IIs. Again, hundreds of people are involved, this can't work (edit: except maybe, in a really close race, using electronic machines, a single programmed backdoor...)