I've been having the same thoughts. Pragmatically, the main roadblock is that the DNSA flag would need to go through some legitimate standardization process. I

I've been having the same thoughts. Pragmatically, the main roadblock is that the DNSA flag would need to go through some legitimate standardization process. It would be really fun* if the headers of an HTTP request were to be considered part of a legally binding agreement between client and server. *In a "mentally deranged fun" sense, of course.