As Lauda’s admitted fan, I respect and appreciate your sentiment; but please do not sow the seeds of what her OP hereby so sought to avoid. This type of speculation could open the way for the scam of a Lauda pretender, in a more subtle way.
Not intended.
A "subtle pretender" is imho not possible. All Bitcoiners know that this kind of claims can be done only and only with (properly) signed message. And I expect that won't ever happen.