The Texas Stand Your Ground Law is a defense to protect oneself in their home, vehicle, or place of work. Not sure if it extends to other places but I recall the words, "place legally to be at" might apply. Would be an interesting case if one was to defend themselves from a sexual assault by a TSA screener. No more force than needed to stop the assault and you can be sure the screener and/orTSA would file charges. Wonder if a person could counter sue in such situation?