Most of the farmers in my extended family are quite intelligent people, many of whom have masters degrees in agriculture.
If instead of "farmers" it said "women" the author would likely get flogged.
That said, there's a lot of good points in this article. SSL wrapping the entire thing so that the autologin URL didn't go over the wire in plaintext would be the obvious next security step.
It's possible he's way off on that assumption, but I would say devoid of data it's a fairly safe one.
I'm sure you could find quite a few insulting fill-in-the-blank nouns.
Farming in western coutries these days is about running lean and highly automated businesses on tiny margins. Virtually all professional farmers are comfortable using computers and specialized software.
That's nice, but are they adept computer users? I know plenty of very intelligent people who haven't needed or bothered to learn how to use a computer well. Stop seeing slights where they aren't happening.