Facebook is the new medium for chain letters. You remember the old chain letters, don’t you? You sent something (a dollar, a recipe, a prayer) to the last person on the list, added your name to the top of the list, and then sent copies of the letter to three other people. These always came with a promise and a threat. If no one broke the chain everyone would reap great rewards, but whoever broke the chain would get untold bad luck. Detailed examples were provided for both. I never played along. I either tried to graciously return the letter to whoever gave it to me or just threw it out as an annoyance. And now, I received the Facebook Gratitude Chain Letter!