"In most Australian states, they are protected species, and to kill or injure one incurs a fine of up to $7,500, as well as a jail sentence of 18 months in some states."
I leave rattlesnakes alone in the wild. In my yard, I kill them - I don't want to take a chance on a grandkid finding one! My horse doesn't like snakes, but she doesn't panic either. The snakes normally slither away.