User blog comment:IamJakuhoRaikoben/Chapter 479: Who you should show the greatest respect to is, review./@comment-24800928-20160330160837/@comment-4829046-20160403173802

Considering how practically no one had proper records of Zeref unless you count the Royal archives and 'rumours', I think it just isn't an issue for him if such matters are spread. Forget the immortality thing, what good will the info be to people that aren't like the other big eccentric FT bosses? I mean, Lost Magic is STILL a novelty in the FT-verse. It would be a 'If you say so situation' in most cases.