If I were to give them a suggestion, I'd try to build the place not only as a warning, but also as a tool to try to preserve language (or encircle the dangerous site with language-learning sites). If language is preserved enough, complex information can be conveyed about the site. We don't need to assume that our language (or language) will be a lost skill (although, if we can make the site human-proof at that level, good on us).