If you embrace only a purely strategic point of view, sure, choose from the palatable tools available to achieve your ends.
But most people have some kind of moral and ethical code, imperfect as it may be. The golden rule is nearly universal across various moral belief systems.
Be careful: if you only consider the purely strategic point of view you may find yourself as the primary casualty. Living without a moral code is perhaps the most self-defeating decision you can make.