It's not that hard to avoid your snake getting bitten as long as you make the snake aware that there's a mouse in the tank, and don't leave the snake alone until it has killed the mouse. If it appears uninterested, remove the mouse from the tank.
Bites often happen when someone drops a mouse in and walks away, expecting the snake to eat it.
Bites often happen when someone drops a mouse in and walks away, expecting the snake to eat it.