It's a great idea which would help in preventing scams.
I think that if this gets implemented, it'd be great if the user can manually enable the public to view his transfer logs if he wants to. Of course, by default it should be viewable only by the user. But to be able to share it to the public (at one's own risk?) would be helpful when one tries to deal with a scammer before volunteers step in, as they'd have concrete evidence to show the ppl the scammer knows to pressure him into returning scammed xats.
But even if it isn't possible to make public, it should still be implem