[–] littul_kitton ago
It depends on the circumstances. A warning shot into the ground is safe and can keep bandits from returning.
If your life is really in danger your shots should be center bodymass or head if the threat continues.
Rule 4 supersedes. If you do not know what is behind your target, you can reasonably aim for the legs, then finish them off on the ground. The people behind their center of mass/head will be grateful.