One man who never needed a name tag was a certain Hercules Ground Engineer, one M*** L***y. As a fellow GE at the time, I often found it useful, when confronted with commissioned disagreement to glance at the name badge (usually a Dave or Fred) and then reply, yes sir, whatever you say !! I doubt that name badges have any use beyond making old farts like myself look as though they have a reasonable name retention capability.
Smudge