An excellent question indeed! and the answer is no... The whole premise of our belief system is based on living in harmony with all things that exist. This includes but is not limited to the earth, trees, rivers, lakes, oceans, air, all of earth's creatures as well as other people without regard to race, color, religion or personal orientation. One interpretation of the Rede says that the creative force of the universe has given an inner voice or "conscience" which tells what is right or wrong. It is also this consciousness that connects to the creator. By listening to this inner voice, one can try to analyze their impulses and feelings to ensure they are not driven by greed, lust, envy, prejudice or anger. If they are, you try to put them in perspective or discard them all together. you then use common sense and judgement in your actions and accept full responsibility for them. This is not always easy to do, but you should try. By keeping these ideals of right and wrong foremost in your mind, as well as seeking to obtain harmony and balance with nature and all living things, you are able to do your best at following the Rede as you go through your day. This is not to say that Witches are perfect, never do anything wrong or make mistakes, we are still human. We are aware of, or try to be aware of the karmic return of our actions, and are very careful not to send out negative energy in thought or deed. Yes, sometimes a Witch will focus an energy form toward someone who needs a psychic zap. This is only done however when a person is consistently doing something very wrong within society and causing a lot of harm to others. If and when a Witch does zap someone, they do so with the full knowledge that it will eventually return to them and there will be a price to pay according to the Law of Three. There are times when we simply must make a personal sacrifice for the good of the whole and shoulder this weight.