I have plenty of "back stop" that will stop the round before going anywhere harmful. I will never take a shot on a deer that is on top of a hill or where I'm aiming with sky as a background. Most times when I shoot the ground is the backstop because I'm up high or at least high enough to make the round venture down. My entrance and exit holes are 99% of the time in direct line of each other. If I'm shooting at a deer on a wood line, there are always enough trees that will "catch" the bullet if I miss or have a pass-through.
...and on that day when my strength is failing, the end draws near and my times has come, still my soul will sing Your praise unending, ten thousand years and then forevermore!