Through out Medieval times, catapults and related siege machines were the first weapons used for biological warfare. The carcasses of diseased animals and those who had perished from the Black Death or other diseases were loaded onto the catapult and then thrown over the castle's walls to infect those barricaded inside. There are other recorded instances of large numbers of beehives being catapulted over castle walls.
If you are suggesting that a few Judges need to be catapulted over some castle walls, i'm hip to that. :)