If you have friends that email you chain letters, do them and us all a favor and reply to them.
go to www.snopes.com and get the truth, they research claims and Urban Legends and give you the background, interesting and informative.
I received the Kidney Theft email again recently, I have had it about a dozen times over the last 10 years. The email is clearly untrue, and designed to spread fear, we have enough of that in the world. I really do not think we need any more please don't sent them on.
Help fix the problem, my suggestion is google the claim or look up www.snopes.com and reply to the email using reply to all to let the people know they don't need to be frightened of this, what ever it is.
Add a link to your blog and invite them to subscribe, after all your a knowledgeable person and check the facts before you spread rumors, and gossip.