While I like the idea, there is a difference between a wasted death and a meaningful death.
I've gone 10+ deaths as Evelynn where nearly all my deaths resulted in a won teamfight. (And I have done the same, without the second part. Didn't win that one.)
Of course, the first situation is likely to generate lots of assist gold which should mitigate the relinquished gold.
I don't think it'd be too strenuous to generate a "death report" that simply includes all farm, tower, dragon, kill and assist gold, plus whatever you were worth given away when you died, since your last death. You could even have k+a total and k+a recent (the last 20 seconds or so) so you know if you got caught or if you were properly baiting. (Well, not completely properly, but a won teamfight is a won teamfight.)
People simply don't believe that they could be at fault, and I think this would help deflate some egos.
End of game could have a graph with amount per player earned, amount per player given away, and a sum. You don't want to be in the red if you're the one doing the flaming, do you?
~Uiru