I'd research alternatives to John Deere. I think there are actually some, right? If there are, I'd go to the Deere dealers first. I'd take my time, chat up the sales guy, get all the way to what looks like a closed sale. Then just as I'm about to sign I'd back out and tell him why. Waste their sales guy's time, and tell all your buddies to do it too.
If all of the companies are pulling this shit, it might be time for another tractorcade like we had in the 70s. Block the Beltway and turn up the turf on the Mall like they did back then. Maybe that'll get their attention.