No, not at all. My only objection ,or for a better word,caveat ,is this: The object of any survival skill is a return to a state of normalcy, be it in a skyscraper or windblown yurpi tent. Dryer lint and seal oil both provide tinder. I can teach the average person how to gather lint much easier than seal oil. People need too understand survival . Fabricating self backed bows can come later. We are digressing from the forum. Email me if you wish, or blow a conch shell. I have both. LOL