"Zebo, a half blind five year old south african orphan has to ride seven miles a day with only one leg on a bicycle with buckled wheels and no brakes. Give just a small donation of two dollars and we will send you the video its hilarious."
I have come to the conclusion that you can post almost anything on Facebook and most people will automatically assume it to be factual. The odds of this are increased if the post is witty and is accompanied by a cute picture.