It always goes something like this: "Please Read! Your Safety Matters!" And it's an e-mail about some horrible story that makes you want to run and hide under a rock (after you've sent it to all your friends).
As my friend who passed this along noted with annoyance, "Please. Has this EVER happened to ANYONE?"
And the answer is: It is an urban myth. You can find it, word for word, on Snopes.com, the very valuable website that tracks and cracks urban myths.