It's clearly our responsibility to be able to accurately know, and explain, NFHS rules. It's also helpful in doing that, if you're able to identify specific differences that may exist with either NCAA or NFL rules to help misinformed individuals understand.
However, whether or not an accurate explanation is sufficient to persuade someone, that they are misinformed and/or ignorant, is sometimes beyond our control. Ignorance can usually be corrected by providing the correct information and detail, stubborn and stupid, on the other hand, are often beyond our capabilities to correct and are often not worth extended effort.