Fred putting a Muzzy phantom in the boiler room at 35 yards doesn't seem too "unethical" to me.
Certainly far more "ethical" than those celebrity hunters that knowingly use equipment that does not allow them to get the best performance from their equipment because of their sponsors advertising contract.
Personally I will purposely put an arrow through the shoulder of a deer any day. I have the equipment and the ability to do it. Others might not and should think twice about doing it.