This is straight out of Monsanto playbook going back decades. There’s a reason why a lot of countries have either passed laws legally shielding local farmers from accidental cross-pollination, or just banning GM seeds, not for any pseudoscience rational, but because of the way agro business uses natural cross pollination as a vector for lawfare and predatory business practices.
This is 98% the right answer, but you drop them somewhere that keeps them intact, and believable enough so that people take them, and spend the rest of the weekend going to thrift stores trying to find an external floppy drive, and the next month trying to figure out how to get their iPhone to mount it.