I am dating myself and making myself unemployable in SV but this was not a normal thing when I was younger. It seems to have become far more common post Bush II; the Supreme Court and hanging chads had a much bigger effect than you'd think.

(Incidentally, I also remember the "Your side lost, hippies" trolls, the "Peak oil" comments, and the apocalyptic "George Bush is going to impose martial law and cancel the election, they are building concentration camps" comments. Such a wild time for internet discussion, many of these were recycled later on.)

I grant that it wasn't too common before Bush vs. Gore. But it did happen. There was in fact a great deal of electoral fraud in the U.S. in the past, too.