As legendary they should protect newbies and report such scams and not support them!
don't generalize it's just one person that having legendary rank asking for vouch,and using word "they" is just not right,there's so many legendary members out there who always feel pleased to help newbies avoiding scammers,and how dare this guy could make them looks bad too?
There is merit in this assumed expectation.
We can't do anything more than censure legendary ranked members who do something slimy/scammy.
But investigating possible measure to vouch is worthy of investigating.
I am all ears with any suggestion, and would be willing to post TALK as bounty for establishing a procedural plan. Likely a round table with several rounds of discussion to see what it produces.