Depends on how "friendly" you want to be the ones who want to reuse it in the future. @question how about "The Software shall be used for Good, not Evil" (1) addition? '# determined that the license was not compliant with the definition of # software, which does not permit any # on how software may be used', "According to the # (Free Software Foundation), this clause makes the license #". (1) https://en.wikipedia.org/wiki/Douglas_Crockford