Oh not death. I have seen people imbibe that much caffeine.I don't know if I would so much call this a 'problem' as I would call it 'death'
I have seen people down ten pots of coffee a day, we are talking ten cup pots. And still drink colas and knock back from caffeine pills and still walk around. At that point they are anxious, easily angered and not thinking clearly though. And that to me is being defiled.