I obviously know that. I was speaking of it in context of someones snake getting loose and infecting someone with salmonella. I am well aware of how it is transmitted as I have an iguana as well.
So the cage factor doesn't matter in this discussion as how would a loose snakes cage in my home hurt the public? It wouldn't. And unless a person was someone infected by a loose reptiles feces however that could happen, a cornsnake in toronto can't really be a cause to ban all snakes over 2 feet.
Thanks goodness Toronto in fact has SENSIBLE laws which only outlaw the species which reach a dangerous length.