While I pity anyone whose life is so bereft of meaning that they have to create a false persona to generate positive feedback and even resorting to making up stories about illness or death to generate sympathy, I have no patience for such manipulative liars.
I think watching the daily news gives us plenty of real world accounts of tragedies without anyone passing off a false one as true.
If such a person has gift for writing such tragedies, write a story, that's what this site is for.