A new form of “chain letter” has become prevalent on Facebook and other social networking sites. For example, they may start with “If you love [support, believe in, etc.] your mother [sister, teacher, nurse, etc.] share this.” They often rely on guilt to ensure propagation (If you don’t share then you must not love your mother!). I always wonder who starts these and why. Some are probably heartfelt but I can imagine some are put out there almost as a game to see how quickly a message spreads.