Let us not forget, Patanjali gave us the ethical component when he codified the system – and he didn’t give it to us as an afterthought. He gave it us first (just as the Buddha did). Most yoga teachers, and all teachers of Buddhism or the major religions, are aware of the ethics of their particular system. If they are not teaching those elements, they may not be practicing them. If they are not practicing the ethics of their system, in all aspects of their life, we end up with more suffering.