I've seen this one a couple of times and it's one of the worst things I have ever read.
tl;dr. A woman in the middle of a divorce has cancer and instead of going to the hospital, she decides to keep it to herself and passive aggressively die to teach her husband a lesson.
Supposed message: appreciate your saintly wife, you clod
Actual message: Hey, women in the middle of a divorce, he will feel bad when you're dead.
This reminds me of a threak a couple years back about what did you get your spouse/your spouse get you for Xmas. I told the Magi story and quite a few people took it seriously.