For those who haven't been paying attention to the comedic effects of intellectual property taken to the extreme (or logical conclusion, I'd argue): just punch "tractor dmca" into your favorite search engine. We often take for granted that people in this sphere are aware of this sort of insanity, but unfortunately that really isn't even close to being true.

Until it's impossible because all tractor makers sell with the same terms. And they've enough money to buy or sue any liberal alternatives out of existence.