Computers can be hacked before they're ever connected to a network. Some of the votefraud systems in use actually have wireless connectivity, too. The belief that this problem would be a myth because someone didn't notice that the problem has been exposed for awhile is a non sequitur.
No, the problem is a myth because the RATS didn't complain this time around. Remember, weeks before the election, all the articles by computer programmers told of how Diebold is fixing the machines for Republicans.
The next day, all quiet. The RATS were preparing us for a scandal that didn't materialize.
Sorry, it is a myth since all the problems that were exposed were exposed by Democrat operatives.
Now is there potential? That's another question.