I guess I am like most and when I have new or young shooter come across my path and I am taking them shooting I go through the normal rules, just to reenforce and remind.
I also have a number of other rules (ethics) on my property, when I go hunting or I am on the range that are not accepted as "standard rules"
Things like, I never shoot a Hare because they mate for life.

Rabbits must always be shot in the head. If you are not good enough to do that go back to the range.

Never shadow your mate on the range when you go down to shoot. Changes in light effects shooting picture.

There are lots of them. Do you have any special ethics? are there things that get your dander up when shooting or you just don't think is appropriate behavior? I am making a list and sure would appreciate a wider perspective.