First, an ethical hunter knows their limitations and does not shoot beyond that limit. If a person cannot consistently be well within the kill zone, don't take the shot.

Second, a new or inexperience hunter should have a mentor/teacher to help guide them and show them the ins and outs of hunting ethically and safely. A lot of hunting tragedies are due to poor decisions by inexperienced hunters or by carelessness of idiots who do not care about the safety and welfare of others.